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Automatic Transmission - 3 Speed

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Re: MY CHEVELLE WAS STOLEN, PLEASE HELP ME FIND HER!!! MOORESVILLE NORTH CAROLINA
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I do Matt, are you on facebook?

I can't believe this is happening.

Posted on: 2022/4/6 2:26
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MY CHEVELLE WAS STOLEN, PLEASE HELP ME FIND HER!!! MOORESVILLE NORTH CAROLINA
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On April 2nd around 5am my 72 Chevelle was stolen from the Langtree Apartment Complex in Mooresville NC. The vehicle is bright orange with white strips and has a 454 engine. It has a white interior. The rear fuel tank in the vehicle is sumped and I have a Bosch fuel pump mounted to the passenger side fender well. There are torque thrust wheels on it and I have a set of Galaxy R1 white letter tires. The pictures attached were taken last fall and show different tires and a New York License plate. The vehicle has a North Carolina plate. When it was stolen I had a vintage 1972 plate on the back I was using for local car shows. That plate number is FJ-3031 and it is white and says 19 72 on the bottom. I am offering a cash reward of $1000 for any information that leads to the safe recovery of this vehicle. This is a car my father and I built and have owned for the past 7 years. Below is a list of the unique features it has. Please keep an eye out on here and other media sites for parts that look similar to the pictures of the car as the police believe the car was stolen to be parted out.

Thank you!

Powder coated silver 12 bolt rear end with wilwood brakes
Sumped rear fuel tank with Bosch external fuel pump
Torque thrust wheels Galaxy R1 Tires
454 fuel injected engine that runs on a PO1 ECU I custom fabricated
Steeroids rack and pinion system
Hydroboost brakes
White interior with black dash
Aftermarket white front seats
Flex Fuel badge on rear trunk lid

Dan
845-699-3150

Posted on: 2022/4/3 1:56
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Re: Lsx Swap Thread 408 to ZF6
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Really? I had some trouble posting them. I went to one of the free services and uploaded them. What's the best way to post them here?


Posted on: 2022/3/4 21:36
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Re: Lsx Swap Thread 408 to ZF6
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Quote:

Matatk wrote:
I think coilovers would have been the correct adult decision... But nice job!


I disagree. It would have been the more expensive way, and yes if the car was going around a track certainly. The GTO had BC Racing Coilovers and even on the softest setting it was miserable to drive on the street. And I've been to the track a grand total of Zero times.... so this works for me. It honestly feels great. The suspension was very stiff and the car had a few rattles... lowering it and changing the tires made it alot more enjoyable to drive.

I am very happy with the wheels... no sunlight to do them justice but I plan to have the car detailed soon and hopefully get the windows tinted. Picking up the engine in a few weeks!

Corvette-9
Corvette-8
Corvette6
Corvette5
Corvette4
Corvette3
Corvette1

Posted on: 2022/2/24 20:26
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Re: Lsx Swap Thread 408 to ZF6
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Interesting few weeks. Spent 2 of them sick and its been snowing in North Carolina. I was lied to. Told it "never" snows here; I moved here to escape snow... record snow fall this year.

I finally got the new wheels and tires installed! Wow do they looks sharp. Except for the huge wheel gaps. So before I posted the pictures I decided that I would lower the car. Not a very difficult project so far, but I found a few issues I need to correct. The tie rod ends are shot and the ball joints could probably use replacement. The control arm bushings are all dried out. Young me would just put it all back together. Adult me will just order everything and spend the time getting it right.
C1
C2
So I am not even 100% sure if this is going to give me the result I am looking for but this is what I came up with. Got the spring all removed. Ignore the extended brake line; I don't care, I am replacing them soon.
C3
I noticed immediately that the end pads on the spring were pretty well stacked so I got the hack saw out and went to work.
C4

c6
The next thing to tackle was removing the plates that are glued to the top of the rubber spring mount. To do this I heated them up and the tops basically popped right off.

C7
I decided to cut this down and run it on a belt sander until there was just enough cushion so when I glued the plate back on the remaining rubber bushing it didn't bottom out on the spring but so it removed as absolutely as much of the rubber (and distance) as possible.
C8
C9

Glued the metal tops on, and tomorrow I will reinstall the spring. I just need to get ahold of some new suspension bushings and tie rods.

Posted on: 2022/2/9 2:48

Edited by Danspeed1 on 2022/2/9 3:06:02
Edited by Danspeed1 on 2022/2/9 3:07:32
Edited by Danspeed1 on 2022/2/9 3:08:52
Edited by Danspeed1 on 2022/2/9 3:11:40
Edited by Danspeed1 on 2022/2/9 3:12:46
Edited by Danspeed1 on 2022/2/9 3:14:28
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Re: Lsx Swap Thread 408 to ZF6
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Quote:

bogus wrote:
The problem with the quicktime bell housing is the built in problem with the clutch in the first place - screwed up geometry.

There just isn't enough room, and using that layout will cause more math problems than I can think of. The fork angle would be whack as hell, I suspect.

As for the input shaft from the ZR1... you would need to get into the transmission, but I think it can be machined... meaning, you can cut it shorter and machine new splines in. I would look into that.

The Aussie flywheel would be a good fix. Make sure the rotating mass is internally balanced, and the new flywheel, whichever one you use, is neutral balanced. The DMFW is balanced to the LT1... and weighs over 40lbs. From my experience, you don't want to go much less than 20lbs, the aluminum flywheels are just too damned light and store no energy in them... Also can be tricky to get started smoothly.

In the old days, so to speak, to convert the Fbody steel flywheel, it was advised to cut .090 off the flywheel and then get it match balanced to the DMFW. Problems solved.

All I can suggest - don't go cheap on this build. If done wrong, you will spend more money making it right!!


Well I made a decision and ordered the parts so I am committed at this point. This was a really tough one. I would have much preferred to take the whole car apart, measured everything and then worked from there but having done the C6 and the Chevelle over the past few years, I know the car will be off the road 3x the amount of time; and even with the LT1 we are thoroughly enjoy it so I do not want to do that.

I literally couldn't get in touch with the Aussie company, and considering the politics over there right now I really wasn't comfortable attempting to try and get ahold of them, get it shipped, and so on. The engine is at the machine shop and we are ready to go. I posted EVERYWHERE and nobody has ever seen a 153 tooth SBC to LS flywheel other than that one. Called all the major manufacturers, nobody had any interest in making one.

I decided to go with the quicktime bellhousing and a complete Fbody Clutch Setup from Monster. I wanted to cut down some of the weight but I made sure to go with their Billet Steel Flywheel (heavier) and I only selected their stage 2 setup which has a full kevlar disk but is sprung. I really don't want to listen to that ZF6 rattle if I can help it.

I agree, the pivot fork geometry is already a problem, and I saw a few failed attempts on the other site involving pull type clutches and adjustable pivot pins so after a week or so of reading I think the best course of action is a one piece hydraulic throwout bearing and the Fbody Push type setup. I did not purchase the TOB yet, I will wait till the car does come apart so I can measure the input tube and then I will find one either from McLeoud or another source.

Finally called TSP and they recommended the Torquer V4 Cam for my application which makes me very happy, since I have one sitting on the shelf from another project; so I saved a few $$ there!!!

And... my wheels finally showed up yesterday after 3 months of waiting, so I will get those on in the next week or so and post some pictures. They looks fantastic sitting in the box.

Posted on: 2022/1/6 21:18
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Re: Lsx Swap Thread 408 to ZF6
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Quote:

bogus wrote:
I think you can use the LSx flywheel from a 1998-2002 FBody. I suspect ZF Doc has an answer for that one, too.

I thought GM used the same bellhousing bolt pattern since they standardized in like c1962? This was done so GM didn't have several different automatic transmissions (Caddy had theirs, Buick had the DynaFlow, etc.).

The plate that ZF Doc made was designed to add space to compensate for the distance between the block/flywheel in relationship to the input shaft of the ZF6. The LSx block is much more compact. Cast more like a motorcycle than an old school SBC. I will never forget seeing a diagram that compared the size of an LS2 vs the a BMW 4.0 litre V8... the LS1 was internally larger (6 vs 4 litre), yet took up 20% less space. And, well, is a shit load more reliable and durable.


You can use the T56 LS1 Bellhousing which will allow for use of the F-body Clutch and Flywheel (168 tooth). According to ZFDoc Site, in order to do this you need his machined spacer plate and the ZR1 input shaft. This ZR1 input shaft is what I am really trying to avoid. I don't want to have to take this transmission apart, and the input shaft is super expensive.

Option 2 is to use an aftermarket bellhousing from quicktime (RM-6039). This allows you to use a 168 tooth truck flywheel with a camaro/corvette clutch. This in my opinion is a better option because you are not messing with the ZF6, just how it mounts to the engine. The issue is getting the fork and throwout bearing to work correctly as it seems those who have already attempted this swap have had nothing but problems with it. They have eventually managed to get it to work but not without a little of assembly and disassembly.

The third option is the one I am trying to figure out right now:

There are a couple of issues with mating a SBC style transmission to a Gen III Lsx. The bolt pattern is close but isn't the same. The lsx engine has the top bolt hole swapped for one at the 2 o'clock position. I found out today that. You cannot drill an LSx block for that bolt hole because it goes through a water jacket. This leaves you with 5 bolts holding the transmission in. Personally... I am not concerned. So this to me is a non issue. The remaining issues are as follows: The LSx crankshaft is .400 shorter than a SBC crankshaft, the bolt pattern on a SBC flywheel is different than an LSx flywheel, and finally the bellhousing on the ZF6 is too small to fit a 168 tooth flywheel, its barely large enough for a 153 tooth.

Here are the questions I am trying to work through right now. Why can't I take a factory DM Flywheel from a C4 or a heavier single mass and add a .400 crank spacer to get everything back in alignment? I know the bolt pattern doesn't match but I am sure there is probably enough meat left to drill the crank for the correct bolt pattern. Shouldn't getting the alignment correct in theory put everything back in its place allowing me to use all the factory LT1 stuff from the flywheel back?

This is what gives me hope:
https://www.marks4wd.com/mfk1947.html

I sent them an email earlier today. They are located in Australia but it seems as though they sell a 153 tooth factory sized flywheel which mounts to an LSx and fits the stock bellhousing. This could be an option. Its not an inexpensive option but it would hopefully allow me to retain more stock components.


Posted on: 2022/1/4 1:06
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Re: Lsx Swap Thread 408 to ZF6
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Quote:

bogus wrote:
IIRC, ZFDoc makes an LS adaptor plate. He is THE man when it comes to the ZF6.

Also, I talked to Chris Petris about this... and the CCM is not friendly with the LSx engine controller, you can kiss ABS and ASR goodbye. I did some digging on this when I had my 1992 coupe and came to the conclusion that you really want to start with a 1989, no chassis controller.

With that said, gauge display becomes an issue, so you will need a gauge package. Which, in theory, will be better anyway!

There are other hot rod shops that make adaptors and such to fit and LSx into just about any car.

Since you are in NC, smog will NOT be an issue, period.

Finally, a 408 in a C4 vert... you will need to reinforce that chassis. There is a reason that GM didn't offer the ZR1 as a vert...

The next big trick is the wiring. A good source is eficonnection.com. They have wiring, PCMs, and other things that go bump in the night.

But to answer the question, this can be done! I know it can be done. I just haven't done it.


I looked into the Gauge Cluster issue, and it unfortunately looks like the best way to retain all the factory function is to run the old ECU with the new one.

Tomorrow I am going to reach out to a couple clutch companies to see what it would cost to have a custom flywheel made. It appears you can run the stock bellhousing and most of the bolts will both up to it. Since my block is currently disassembled I am going to see if my machinist can drill tap the remaining holes so the SBC bellhousing bolts directly to the 6.0 block.

Ill post back my findings.

Dan

Posted on: 2022/1/2 20:39
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Re: Lsx Swap Thread 408 to ZF6
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I will post up the solution once I find it and specifics of my build once it gets going. Right now the 6.0 block is at my machine shop and will return March 3rd assuming I can figure this clutch issue out in a reasonable amount of time.

Posted on: 2021/12/26 16:24
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Re: Lsx Swap Thread 408 to ZF6
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Hey Matt,

Merry Christmas. I read through all of those threads already except the one from this site (which I will do now), although I appreciate you posting them. I posted on facebook and was sent this link:

https://ls1tech.com/forums/conversions ... vVNNkkca069JnKB3rEC8IaLx4

Great thread. I didn't get a ton out of it because it specifically talks about early 4 speeds and I am not sure how they differ from the ZF6, but what I did come to the conclusion on was that any bellhousing from a Early SBC can bolt to an LS with 5 bolts. And if I am understanding correctly the Flywheel is tucked towards the block .4"; so you can use a spacer to put the flywheel back into alignment or buy a custom flywheel (haven't been able to find one yet) that is .4 thicker or spaced correctly. The other potential issue is that the ZF6 uses a smaller 153 tooth flywheel that is dual mass while the LS uses a regular 168 tooth flywheel. I didn't reach out to ZF Doc because I really want to try and avoid the $2100 expense of the shaft and separator plate . But of course I do recognize that there have been much smarter guys than myself working on this swap and all of them pretty much seemed to go with the Quicktime bellhousing, and Spec Clutch Setup.

DG

Posted on: 2021/12/25 16:26
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Lsx Swap Thread 408 to ZF6
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Hey guys,

Happy Holidays! About a month ago, after I bought my Polo 95 Convertible with a ZF6 I hinted that I had a LQ9 from another project I was tossing over the idea of installing. Well, the idea became a project about two days ago. I got a great black friday deal on a summit pro ls forged 408 rotating assembly. I brought the engine back over to my machine shop to have the bottom end rebuilt and he asked me for the clutch and pressure plate. I plan to spin this thing to 7500, and he would like to balance it all together to make sure there are no balance issues. The problem is I have only been able to do a few hours of research on the trans side of the project and I need to come up with a clutch assembly ASAP. I see some guys on CF using the quicktime bellhousing, and other guys using a ZR1 input shaft and mounting plate with a stock bellhousing. I do not want to pull the car apart just yet as I do drive it with the LT1 and I am going to be borrowing space to do the swap. I need some tech support on what direction to head in and what clutch parts to order. After a few hours of reading, I still haven't been able to find a definitive reason why I can't just bolt the ZF6 to the LQ9 block and use a Flywheel spacer to put everything back into alignment? I would appreciate it if you guys could open a discussion about things that work, possibilities, or potential people I can contact that have a good understanding of the ZF6. I see now more than ever these transmissions are fading away and there is very limited info on them.

Merry Christmas!

DG

Posted on: 2021/12/24 15:27
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Re: FS: 2004 LS1 GTO - The last of the GTO Muscle Cars....
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Full Circle... and I sold it finally after all those years... and bought another C4.

It did have the LS1 but I built a High Compression 6.0 for it which was never installed and is now sitting in my garage, with nothing to put it in

Unless.........................

Posted on: 2021/10/22 2:38
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Re: I've been gone for a while, but I'm back
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Thanks Matt, Its good to hear from you, I am glad you are still on the board. Sorry to hear about your C4

Posted on: 2021/10/22 2:28
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Re: I've been gone for a while, but I'm back
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I have a high compression Iron 6.0 with Ported Heads and a TSP Torquer V4 cam that's been sitting in the corner of my storage container for the last few years. I built it for another car which is gone. I haven't had any idea what to do with it.... but its come to mind the last few days.....

Posted on: 2021/10/21 15:08
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Re: I've been gone for a while, but I'm back
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We took a brief look at C5s before we bought the C4. C5s are the best deal on the planet right now. With that said, its all about feelings and timing. Neither of us wanted the C5. To us it looked oddly dated? Funny saying that since the C4 is literally dated. I guess the C4 is dated in the right way at this point in history. Its got a great feel. We both missed how raw the car was. In my opinion it has just the right amount of creature comforts without feeling so modern; it still gives you that raw driving experience and connected to the road feel.

We had a great time with the C6, and went a lot of places with it, but it almost drove too well? I'm not sure how to explain the feeling but I am happy to say at least for right now we are thrilled with our purchase!

Posted on: 2021/10/21 15:04
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Re: I've been gone for a while, but I'm back
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Thank you. This has been a color combo we have been lusting over since early 2000... definitely worth the wait, I love looking at it.

Posted on: 2021/10/20 14:34
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Re: I've been gone for a while, but I'm back
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Thanks guys... and It is official, I am a C4 owner once more; blend door failed as well as the outside temp sensor. I had no heat the last two days. Got a new one off amazon same day and got the temp sensor from Zip. Heat blows hot; AC Ice cold.

I also ordered a set of wheels and tires....

Overall I am very happy to be back. Car drives great. I missed the "experience" all new cars seem to lack.

DG

Posted on: 2021/10/20 3:32
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Re: I've been gone for a while, but I'm back
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One more since i can't seem to post more than one at a time


Attach file:



jpg  1995 C4 2.jpg (985.80 KB)
961_616e0f82565b9.jpg 1894X1420 px

Posted on: 2021/10/19 0:20
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I've been gone for a while, but I'm back
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Hello Guru's - I missed you guys.  I haven't been on here much in the last few years becasue I haven't had much to talk about.  But I am very pleased to announce... I did it right, and purchased a 95 Polo Green/Tan C4 Convertible with a 6 speed.  Its been a crazy couple of years. We sold our 89 Z51 over 10 years ago to get into something a little more modern, a little safer, a little faster.  Thats how we wound up with our 05 C6 still in the avitar below.  We kept that car almost 8 years.  It went from a base Z51 to making 585hp with a Maggie, methanol, heads and cam setup.  It was a wonderful car and stupid fast.  We had alot of fun with it but everytime we started talking about our entry into the Corvette world somehow we kept coming back to how great our C4 was and how much we missed it.  In 2017 we sold the C6.  It was the right time to do it.  From there we bought a Cadillac CTS 3.6, then a Challenger R/T (great car too), and back to a Cadillac CTS-v.  I also acquired a 72 Chevelle.  We were recently forced to relocate from New York, but we managed to land someplace warm.  When my wife and I talked about picking up a spare car we both came to the same conclusion; it was time for another C4.  So we are back.  We are back with a really cool car, in a really cool color, with low miles, and with all the C4 problems.  So I look forward to speaking with all of you again real soon LOL!


Attach file:



jpg  1995 C4 3.jpg (994.44 KB)
961_616e0e6ce0257.jpg 1501X1125 px

Posted on: 2021/10/19 0:17
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Weird request for a Wiring Diagram
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Hello all,

Unfortunately I haven't been on here in a while. I miss my C4. I need a little help with an unrelated project and I figured this would be a good place to ask.

Ready..... I am installing a gauge cluster from a 98 Grand Am (4 Cylinder) in my 72 Chevelle.

I need the pinout for the back of the plug that goes into the cluster on the grand am. I've asked a few other places and haven't received any responses. GM really keeps this stuff under lock and key now.

If anyone has access and can post a picture of the diagram I would greatly appreciate it.

Dan

Posted on: 2021/4/27 15:48
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Re: FS: 2004 LS1 GTO - The last of the GTO Muscle Cars....
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I know I shouldn't bring this thread back to life but I returned to the site in search of some information in regard to my 89 corvette I sold years ago. I stumbled across this thread and laughed. This car was put into storage and never sold... until this past year, when I bought it. How ironic.

Posted on: 2020/9/28 3:13
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Re: Four Very Different Coupes
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Cars from the 80s have a special place in my heart. When I got my license in 2002 an 80's car was all I could afford. Had a blast in my 1985 Monte Carlo SS. It was beat but boy was it fun to drive. Of the 40 or so cars I have owned since then, that Monte ranks #2 on my favorites list.

Lets not forget of course the end of the C3 era and the birth of the C4... my 2 favorite generations of corvette spanned that decade.

Cars on my current to own list may not seem to impressive and are certainly very affordable if you can even find them. Some of them span into the 90's but they are 80s inspired.

Chevy Lumina Z34 with the 3.4L DOHC V6
Chevy Beretta GTZ Quad 4 with a Getrag 282 5 speed
The Pontiac 6000 STE AWD
Chevy Caprice

DG

Posted on: 2017/8/11 0:03
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Re: Opinions: Rough Idle, Code 43
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Thank you

Posted on: 2017/6/4 14:32
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Re: Opinions: Rough Idle, Code 43
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Hey Matt,

I really appreciate that. I will try and go through the proper diagnostic procedure once you post it. But I am also pretty convinced its the ECM because of the communication issues with the scan tool. I think my buddy is pretty screwed on this one...

Thanks,
Dan

Posted on: 2017/6/3 14:14
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Opinions: Rough Idle, Code 43
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Hey guys,

Working on a 1992 Corvette for a buddy of mine. Really nice car with just 20,000 miles on it. It sat under a cover for the last 10 years. He recently took it to a car show and out of nowhere it started running really erratic. I was able to get it to throw a check engine light; CODE 43. I got the grand idea to use my moats equipment and Tunerpro to check knock counts and timing retard. Couldn't get any of my equipment to work with the car. Kept coming up with error counts. I moved on to my Snap On Red Brick (early 90's) and the scan tool could not establish communication. Seen this before... recently... I am thinking the ECM took a crap. Thoughts?????

The next issue becomes... I contacted all the local auto parts stores in my area and it doesn't look like anyone is re manufacturing these. Anybody have any ideas where I can get on if infact he needs it?

As always.... Thank you

Dan

Posted on: 2017/6/2 21:14
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Re: Shocking News... A Decision Has Been Made
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Congratulations on the new car Andy and welcome to the C6 Section lol

Dan

Posted on: 2017/4/16 4:55
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Re: Hello from New York
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Welcome from Orange County!

Dan

Posted on: 2017/4/16 4:52
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Re: Shocking News... A Decision Has Been Made
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You'll love it Andy. We were so excited when we bought ours, have had it for 8 years. Its a great car, but the best advice I can give you is try to refrain from modifying it. My project snowballed and I've got ZO6 money into a car Ill be lucky to see 40% of the value of. Ironically this is our last summer with the C6. After 8 years, we did it, we enjoyed it and its time to move back into a C4. I'm out of things to modify on this car I guess. lol. Good luck with your search!

Posted on: 2017/3/30 4:07
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Re: Spring Forward Sunday Chat. 03.12.17
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A little late to the party but when I woke up this morning it was 11 degrees... we made it to 23! Spring forward to tomorrow night and there will be 24 inches of snow on the ground. Happy Spring!

DG

Posted on: 2017/3/13 5:09
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Re: Back on Tuning, found another issue with o2 sensors
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Nope, but In the future I might look to move towards a stand alone setup like Megasquirt or something comparable so it would be similar to tuning a newer car... much easier.

Posted on: 2017/2/9 6:02
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Re: Please help identify this brace
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Boy i was way off...

Posted on: 2017/2/8 5:19
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Re: Back on Tuning, found another issue with o2 sensors
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Moates Autoprom APU1 and Tuner Pro RT

Its tough to get it up and running but once your going its pretty easy to use

Posted on: 2017/2/8 5:18
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Re: Please help identify this brace
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Looks like the brace that holds the air pump on the front of the engine if I remember correctly. It could also be the lower bracket for the Air Conditioning pump depending on the year. Do you have your Air Pump installed? I would check both those locations and see how they are held on, and report back.

Dan

Posted on: 2017/2/7 16:13
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Re: Back on Tuning, found another issue with o2 sensors
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Quote:

Matatk wrote:
If you have headers a heated O2 is a necessity.


Your not kidding! 100% transformation. BTW this tuning isn't so bad once you have the program setup correctly and the hardware working correctly as well. I got the idle issues situated finally. The headed 02 gave me the ability to properly dial in my BLM's finally!

Dan

Posted on: 2017/2/7 16:12
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Re: Back on Tuning, found another issue with o2 sensors
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Thanks,

I'm going to swap it out for a heated one and give this another shot

Posted on: 2017/1/23 5:35
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Re: Back on Tuning, found another issue with o2 sensors
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LOL! That makes sense. of course the passenger side has a sensor with the wiring hanging, but after googling what you just said, ill remove the sensor and replace it with my wideband.

Dumb question I couldn't find the answer to anywhere. Thanks for clarifying!

DG

Posted on: 2017/1/20 5:23
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Back on Tuning, found another issue with o2 sensors
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Hello everybody!

I haven't posted in a while so Ill give a little background first. Still working on the slowest C4 project ever, but overall things are going very well. Car was put away for winter but I'm getting the itch to get it back out already and keep working on getting it dialed in. This is a 1990 Corvette that was in a fire... wiring harness, engine, just about everything has been replaced. Last year I got it running and somewhat driveable using moats and apu1. I broke out the car a few days ago and started playing with the tuning software again. I noticed some strange issues with the 02 sensors so I decided it might be worth swapping them out for some updated, heated ones. What I found was very interesting:

The drivers side is connected. Its dark in the garage but it looks like a purple wire, original connector still intact. However the passenger side is GONE. No wire, no connector. I started to thumb through the harness, can't find the wire or connector anywhere. Its like it was deleted at some point. Dad states "I didn't touch it." LOL so I can't blame him. Been search Chevythunder for diagrams but to be honest a lot of this has been trial and error if you have been following my posts, the harness never seems to match up to anything on a diagram.

Would anyone be able to tell me what the correct wire color of the passenger side, and drivers side (why not?) oxygen sensors are for a 1990 and possibly a 1991 Corvette? If you have any detailed diagrams, or pinouts please post them as well as I can't seem to match up anything to this car.

As always your help is greatly appreciated. Looking forward to getting back on this project after months of reading!

Dan

Posted on: 2017/1/19 16:39
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Re: XDF file $8D 1990 Corvette
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Jeff,

This is an excellent file. Really easy to understand even for someone who has never done this before. This should be permanently posted somewhere on the site.

GREAT NEWS!!!

Although my autoprom is still not working correctly (more than likely user error) I was able to burn a few chips by removing and reinstalling them. Using Jeff's XDF file I was able to make enough small changes to a file I found that I was able to get the car running properly about 85%. It runs almost perfectly from 3000-6000RPM at WOT. I think the tune is going to need very minor adjustment there. There is a little pinging around 1900-2200 RPM's at about a 30-40% load. My father and I took the car out for its first ride yesterday. It rides like a new car with only 36K miles on it. Even raced a Buick Apollo and it was able to hold its own. Its very quick for what it is. Its great to finally get a little satisfaction out of nearly 2.5 years of labor. I will post some videos and pictures in a new thread..... and then its onto saving the next c4.

(LS swap anyone?)

DG

Posted on: 2016/9/24 15:54
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Re: XDF file $8D 1990 Corvette
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THANKS JEFF!!! Ill write back later this week with the results.

DG

Posted on: 2016/9/19 19:57
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Re: XDF file $8D 1990 Corvette
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Thanks for the tip Andy, I sent him a PM

Posted on: 2016/9/19 17:10
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XDF file $8D 1990 Corvette
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Anybody got one that they know works? The one of the Tuner pro website is shot.

Dan

Posted on: 2016/9/19 4:50
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Re: Continuation of ECM diagnosis in regard to No communication with ECM through datalink with chip inst
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BTW, I am trying to understand which files work with which a little better. I see online files are listed as AYBK for 1990 Corvette. I am assuming this is in regard to the broadcast code???? My factory memcal says BFXB. What does this mean?

Posted on: 2016/9/16 17:33
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Re: Continuation of ECM diagnosis in regard to No communication with ECM through datalink with chip inst
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G1 with ZIF came in today. Installed it and tried to emulate with the Autoprom. Nothing new, same issues, except now I am getting a code 51 for EPROM malfunction. I'm out of ideas. Does anyone have a known good .bin for a 1990 350 with TPIS, Headers, Ported Heads, Cam, and 22lb injectors?

Dan

Posted on: 2016/9/16 16:17
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Re: Continuation of ECM diagnosis in regard to No communication with ECM through datalink with chip inst
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I decided to purchase another one anyway. I purchased one with a ZIF socket. If it fixes the problem, great, if not I will have it for the next car. It seems as though their will always be a C4 of sorts in my life LOL.

DG

Posted on: 2016/9/12 14:37
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Re: Continuation of ECM diagnosis in regard to No communication with ECM through datalink with chip inst
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I did make some progress in the right direction today (I think), but I am still having issues. I could write all this up but its easier if you just watch the video.


Posted on: 2016/9/11 3:46
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Re: Continuation of ECM diagnosis in regard to No communication with ECM through datalink with chip inst
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Quote:

BillH wrote:
Well, I do know that any ECM from a 92/93 Firebird or Camaro is the same as a 92/93 Corvette. The chip will plug right in and the car runs fine (I have one).



Thank you! Hold that thought just one more day, I am having a hard time believing the ecm is bad, I want to check all the wiring again first! If that doesn't fix it I will likely pm you for details!

Dan

Posted on: 2016/9/10 17:22
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Re: Continuation of ECM diagnosis in regard to No communication with ECM through datalink with chip inst
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Quote:

Matatk wrote:
Sorry, I haven't been on the forum in a couple of days.


Thats's quite alright. I never get to post very often anymore as I am always so busy, but I appreciate all the help you've given me over the years.



With the "new ECM" does it run with the stock chip?

It doesn't run very long on the stock chip, but I don't expect it to either. The injectors are larger and with the number of modifications, even though they are light mods, I don't think the stock chip should support them. On the last known bad ecm, the car did go directly to limp mode which it did run on at 1400 rpm.


What type of adapter are you using for the burned chip?

G1



What is the part number of the burned chip?


SST 27SF512 Chip, but it wont run in emulation mode either



Have you tried another chip to burn?

3

What is orientation of the chip in the adapter?


Connected to the non chip side (limp mode side) of the memcal


Please take a picture as installed.


Sure, actually, Ill take a bunch of pics today and even a video!


Thanks

Posted on: 2016/9/10 17:20
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Re: Continuation of ECM diagnosis in regard to No communication with ECM through datalink with chip inst
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Quote:

BillH wrote:
Quote:

Danspeed1 wrote:

1. Does anyone have a list of vehicles/and or part numbers of ECM's that will work with this car. I am thinking of heading to the U Pull it yard for an off model donor

Dan


Pretty hard to tell if we don't know what year your car is.


1990 Corvette. Stock refreshed bottom end. Ported aluminum L98 heads, small cam, TPIS mini ram, Hooker Headers, No EGR, HEI distributor

DG

Posted on: 2016/9/10 17:06
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Re: Continuation of ECM diagnosis in regard to No communication with ECM through datalink with chip inst
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Quote:

joeld wrote:
Do you have the stock memcal in now, or the "custom" chip?

Joel


I have cycled between just the stock memcal as well as the autoprom emulation tool. It doesn't run long with the stock memcal but I dont expect it to either because of the injector size, however it seems to want to run with the tune, but keeps flickering the check engine light. As the light flickers the car misses.

DG

Posted on: 2016/9/10 17:04
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Re: Continuation of ECM diagnosis in regard to No communication with ECM through datalink with chip inst
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New ECM, no communication again. The issue must be with the car. Which is odd because it communicated 2 days ago, but whatever. Idea's???

I'm going to check out flow chart 8a

Posted on: 2016/9/9 18:34
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