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| biggrizzly | Running Problem | ||
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2011 Memorial Day Car Show Winner!
 
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I'm waiting for an answer back from Mick on this but I thought I'd ask you guys too. When I first started my car after installing the engine the Data Scans show an erratic voltage during the 20 seconds that the car will stay running on its own. I know there is something electrical going on but not sure what. I took the battery and the alternator down and had them tested. They are both fine, but I still get some clicking from the starter before it will turn over. Then when it does the car runs like crap and dies within 30 seconds unless I give it some gas. Still runs like crap and then when I let go and close the throttle blades it stumbles and stalls. Eratic voltage on the scans, poor to no idle, still seems like the battery is bad but I know its good. Could this be a starter solenoid going out? Would it cause erratic voltage while the car is trying to run?
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Posted on: 2011/5/27 0:37
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Don Haller Corvette Club of America 94Coupe, 383Stroka, PeteK Trans, 3000stall, 3.54rear, Konis and bigger sways. |
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| BillH | Re: Running Problem | ||
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The Stig Moderator
 
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Did you clean up all the grounds when the engine was out?
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Posted on: 2011/5/27 0:45
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| biggrizzly | Re: Running Problem | ||
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2011 Memorial Day Car Show Winner!
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Yes... I assume you mean the bundle of grounds that are attached at the transmission and block and the other grounds near the rear of block by the oil filter?
I'm going to get some energy and crawl back under there and look them over again. |
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Posted on: 2011/5/27 0:49
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Don Haller Corvette Club of America 94Coupe, 383Stroka, PeteK Trans, 3000stall, 3.54rear, Konis and bigger sways. |
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| BillH | Re: Running Problem | ||
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The Stig Moderator
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I said that because of the starter still clicking. Put a voltmeter on the battery, you should have at least 12.5 before you try to start,if not, there's resistance somewhere.
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Posted on: 2011/5/27 1:57
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| biggrizzly | Re: Running Problem | ||
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2011 Memorial Day Car Show Winner!
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OK, I found why the battery was clicking... but I don't know if I still have erratic voltage during the run as I didn't do another scan just now. I'll do that tomorrow. The big thick ground cable at the starter was indeed loose. I never tightened it up.
 That solved the clicking and hopefully the erratic voltage that we were seeing on the scans. However it still will not idle high enough to stay running. One step at a time. |
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Posted on: 2011/5/27 2:28
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Don Haller Corvette Club of America 94Coupe, 383Stroka, PeteK Trans, 3000stall, 3.54rear, Konis and bigger sways. |
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| rklessdriver | Re: Running Problem | ||
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Senior Guru
 
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Do you have a new TB or still running the same on you had on the orginal motor?
You may need to crack the throttle blades open a bit or drill a bypass hole in them to get it to idle with the new bigger engine and cam. Look at the IAC on your data master. If it's open 100% and the car still won't idle you need to by pass some more air. Will |
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Posted on: 2011/5/27 20:08
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1984 Corvette. 434 SBC with a Powerglide. Best pass - 8.48@160MPH 1.23 60ft on MT 275/60R15 Radials. 1972 Corvette. LS5 454 BBC with M20 4 speed. Best Pass - Doing good to just pass a gas station. |
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| biggrizzly | Re: Running Problem | ||
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2011 Memorial Day Car Show Winner!
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Quote:
This is a Professional Products 58mm. I used it on the previous top end rebuild and it seemed to work ok. idled fine and no problems. It's difficult to get a decent scan as the car will not run unassisted for more than 30 seconds or so. It will start then within a couple seconds of starting it just stumbles and dies within 25-35 seconds. If I open the throttle a bit it will run, but still seems a little on the rough side. I need to get a few more scans and maybe we can see what is happening. |
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Posted on: 2011/5/27 22:24
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Don Haller Corvette Club of America 94Coupe, 383Stroka, PeteK Trans, 3000stall, 3.54rear, Konis and bigger sways. |
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| rklessdriver | Re: Running Problem | ||
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Senior Guru
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I got you. Might not hurt to give the idle screw a few turns out and let it idle about 1500RPM to clean the plugs off then slowly turn it closed until it will idle to take your data logs.
Will |
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Posted on: 2011/5/28 1:35
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1984 Corvette. 434 SBC with a Powerglide. Best pass - 8.48@160MPH 1.23 60ft on MT 275/60R15 Radials. 1972 Corvette. LS5 454 BBC with M20 4 speed. Best Pass - Doing good to just pass a gas station. |
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| BillH | Re: Running Problem | ||
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The Stig Moderator
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Quote:
I use a nickel or a penny for the fast idle cam on the racecar.  Somewhere I have a nickel with a hole in it and a "Remove Before Flight" tag on it. |
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Posted on: 2011/5/28 2:00
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| Matatk | Re: Running Problem | ||
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Webmaster
 
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This is a bit late, but make sure anywhere you have grounds have a clean connection...ie no paint on the block from when it was rebuilt.
Any progress? Matthew |
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Posted on: 2011/5/28 2:20
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| rklessdriver | Re: Running Problem | ||
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Senior Guru
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Quote:
I always like using a number 1 straight slot screw driver.... Drops right down inbetween the linkage and the idle screw. |
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Posted on: 2011/5/28 2:48
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1984 Corvette. 434 SBC with a Powerglide. Best pass - 8.48@160MPH 1.23 60ft on MT 275/60R15 Radials. 1972 Corvette. LS5 454 BBC with M20 4 speed. Best Pass - Doing good to just pass a gas station. |
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| mseven | Re: Running Problem | ||
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Senior Guru
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voltage drops like I had seen in your first scan can be caused in a few ways. Typically it would be batt. condition or poor alternator charging. Glad you found the source from the batt. ground...I would also check the all and any of the ones from the motor swap.
From your first start-up, I mentioned to lower the counts or to turn the min. air screw clockwise as to open the throttle blade. It was reading at least 80 counts, start with 1-1/2 turns and go from there. The target at operating temp will be around 40 counts in p/n. sorry for the late response, I've been working alot lately so I haven't had much time to look on the boards. Mick |
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Posted on: 2011/5/28 11:21
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| biggrizzly | Re: Running Problem | ||
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2011 Memorial Day Car Show Winner!
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Mick... you need to take a break guy! All work and no play is hard on a person. Thanks for the reply... I'm going to make some changes and do a few other scans this morning. I'm juggling house work... and car work this weekend!
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Posted on: 2011/5/28 11:40
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Don Haller Corvette Club of America 94Coupe, 383Stroka, PeteK Trans, 3000stall, 3.54rear, Konis and bigger sways. |
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| mseven | Re: Running Problem | ||
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I hear ya...work keeps my mind off of thinking about the x.
This weekend is being devoted to getting my junk up and flying again....once again, another set of changes for 2011. maybe I'll even get the thing fired lol re-check your email |
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Posted on: 2011/5/28 11:51
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| biggrizzly | Re: Running Problem | ||
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2011 Memorial Day Car Show Winner!
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Mick,
opening the throttle and the new bin file worked. It will now stay running. I let it run for about 2 minutes, but didn't want it to get too hot because I have to wrap that harness I was telling you about. I'm going to let it cool down and then tie up the O2 harness, get the car down off the stands and pull it out of the garage. I'll run a few more data scans and send them to you later today. If I can get this car running satisfactorily, I'd like to drive it up the road about 2 miles to a Sunday afternoon Cruise-In and Shrimp feast with my buddies. Maybe I'm getting ahead of myself? |
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Posted on: 2011/5/28 13:32
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Don Haller Corvette Club of America 94Coupe, 383Stroka, PeteK Trans, 3000stall, 3.54rear, Konis and bigger sways. |
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| Matatk | Re: Running Problem | ||
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Webmaster
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Congrats, Don!
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Posted on: 2011/5/28 14:46
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| biggrizzly | Re: Running Problem | ||
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2011 Memorial Day Car Show Winner!
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Matt, Its still a little rough. It idles great now and will run up through the rpm range pretty smoothly, however when I put it in gear the rpm drop significantly and it choked and died a couple times on me just pulling it out of the garage to turn it around.
I just sent two more scans to Mick to see what he thinks. |
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Posted on: 2011/5/28 20:27
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Don Haller Corvette Club of America 94Coupe, 383Stroka, PeteK Trans, 3000stall, 3.54rear, Konis and bigger sways. |
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| mseven | Re: Running Problem | ||
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Senior Guru
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your logs show the IAC being commanded in open loop to the corresponding tables/counts v.s. temp. However once in closed loop it shows that the IAC is at 160 counts, and would be the cause of roughness and other issues you mentioned. This would mean that the throttle body blade is closed and the IAC cannot comp./add enough air. I would first remove the air horn and do a visual check of the throttle blade (to see that the blade is closed or ?) to ensure there are no issues with the IAC. More than likely you will have to re-set the min air screw so that the tb blade will be cracked open slightly(clockwise as to open the throttle blade)at idle. I would start with about 2 turns while the car is running, turn off the car and re-start so that the IAC can re-set itself. Look at the screen and keep doing the procedure until you are approx. 40 counts.
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Posted on: 2011/5/29 4:31
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| WW7 | Re: Running Problem | ||
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Senior Guru
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Posted on: 2011/5/29 13:14
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| JeffK | Re: Running Problem | ||
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Elite Guru
 
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Quote:
Sounds exactly like the issue I am having with my new engine. Creepy. |
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Posted on: 2011/5/31 17:39
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| biggrizzly | Re: Running Problem | ||
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2011 Memorial Day Car Show Winner!
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Jeff, I really had to crank open that throttle screw. I also readjusted my TPS to .59 -.60v --- Don't know it that helped, but its sounds a ton better with both those adjustments. I'm waiting now for an activation code from TTS DataMaster for the software. I used up my 20 some scans already... I called and paid for it this morning and I'm hoping they email it by tonight! I can't send Mick any more data until I get that.
Anyhow, if you haven't cracked open that air screw it really did help mine. I was just shocked that it needed that much air compared to the old 350ci set up. I guess something else could have changed to though... good luck with yours... |
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Posted on: 2011/5/31 18:46
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_________________
Don Haller Corvette Club of America 94Coupe, 383Stroka, PeteK Trans, 3000stall, 3.54rear, Konis and bigger sways. |
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| JeffK | Re: Running Problem | ||
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Elite Guru
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I did the IAC reset this evening and it seemed to help. I sent Mick a file last night maybe he will see something in there that will bring some light to it.
I'm really glad that you are getting yours worked out. You have a bunch more $$ in yours than I do. |
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Posted on: 2011/5/31 23:49
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