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| bogus | My 92 died on my this morning... | ||
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Grand Imperial Pooh-Bah
 
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I was going to work, here is the break down of what happened.
* It started just fine. * Ran great down my street, no problems making a left on to the next street. * About halfway between lights, it just quit. It sputtered and would not restart. * I coasted to a side street (Vette, no PS, SUCKS!) and proceeded to check stuff. * No codes; except C12. * All electrical connections were tight. * Tried to start, no go. Smell of raw fuel. * Good fuel pressure (40 PSI). * Check vacuum line to TPiS AFPR, no sign of fuel. It finally started when I floored it, as if to clear a flood condition. It took about 30 seconds to recover and run ok. It seemed a bit delicate for the first mile. Recent work: * Engine out service for oil leaks * Clutch * New FIC Bosch Type III Injectors at OEM flow rate My thought? The TPiS AFPR is screwing up. I had this problem before the injectors went in and now it's back... |
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Posted on: 2009/10/2 14:55
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| Josh | Re: My 92 died on my this morning... | ||
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Guru
 
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Opti. It's always opti, lol.
The only way to diagnose it is to get some tools on it while it's messed up. Check the fuel pressure, and look for spark. I would start there. |
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Posted on: 2009/10/2 15:11
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| 1Fast04Vert | Re: My 92 died on my this morning... | ||
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Elite Guru
 
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I am betting on the ICM. This is just a bet, not advise. Whatever it is I hope it is a simple, easy, and cheap fix.
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Posted on: 2009/10/2 16:03
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2004 Vert. 475hp. Built by Vengeance Racing |
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| bogus | Re: My 92 died on my this morning... | ||
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Grand Imperial Pooh-Bah
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Oh, I don't have the ICM anymore...
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Posted on: 2009/10/2 16:24
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| CentralCoaster | Re: My 92 died on my this morning... | ||
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Senior Guru
 
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Well, flooring it during cranking should disable the injectors in the ECM, so that doesn't quite make sense. Did you crank while floored, then it started on the next try after?
But yeah, sounds like it was flooded. I don't suspect that cause the car to die though. It probably just flooded while cranking it, because there was no spark, the same spark that caused it to shut down. |
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Posted on: 2009/10/2 16:42
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1985 Z51, ZF6 |
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| Matatk | Re: My 92 died on my this morning... | ||
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Didn't those afprs have problems in the past?
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Posted on: 2009/10/2 18:32
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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| bogus | Re: My 92 died on my this morning... | ||
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Grand Imperial Pooh-Bah
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Quote:
Now... you have had me thinking. This start problem began AFTER I did the engine out service. One thing I did do was replace a hard solder job with a connector. This wiring feed the LTCC with the coil power and feeds the ECM with the tach signal. Now... if the coil lead is failing, it would loose power to the LTCC, the engine would die and no codes would be reported. I am going to fix that before anything else. IF the LTCC dies, it would try to feed fuel even if the spark was gone... |
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Posted on: 2009/10/3 16:28
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| dan0617 | Re: My 92 died on my this morning... | ||
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Senior Guru
 
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If it's the AFPR, you will have fuel squirt out the vac line nipple while cranking. Pull the vac line off and see if it is wet. If not, start the car or crank the car while watching where the vac line hooks to the AFPR. No fuel coming out, likely the AFPR is fine.
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Posted on: 2009/10/3 21:05
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´89 Vert, 383, 230/236 cam, AFR 195's, LT Headers, HSR intake, 2800 stall, Zex 200 shot, ET Street Radials, tune by me. Runs were with D36 3.07's. On spray, 10.55 @ 132.78, 1.55 60 ft. On motor, 12.08 @ 113.15, 1.66 60 ft. |
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| bogus | Re: My 92 died on my this morning... | ||
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Grand Imperial Pooh-Bah
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The line has been dry... checked it. And didn't smell funny, either.
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Posted on: 2009/10/4 5:44
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| bogus | Re: My 92 died on my this morning... | ||
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Grand Imperial Pooh-Bah
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I figured it out... now... why I don't have a code is baffling.
The temp sensor(or is that censor?) this morning read 78F... the oil read 154F... hello. Either I have a bad sensor (the 2nd in a month) or a wiring problem. I am going to get a new sensor today, and will check wiring to be sure. |
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Posted on: 2009/10/5 15:18
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| CentralCoaster | Re: My 92 died on my this morning... | ||
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Senior Guru
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A bad ECM coolant temp sensor can fk up the fuel delivery enough to not start properly. But that reading sounds accurate.
Oil temp sensor only feeds the cluster, so it wouldn't throw a code, the ECM doesn't see it, doesn't care. |
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Posted on: 2009/10/5 16:33
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| bogus | Re: My 92 died on my this morning... | ||
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Grand Imperial Pooh-Bah
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Ah, but the later models read the oil temp and look to see if they are close. At startup, they should be, but if they diverge in the wrong direction, then things get nutty.
At startup, the oil and coolant should only be 10F off (or so). As things warm, the coolant should always be higher than oil temps. |
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Posted on: 2009/10/5 17:19
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| dan0617 | Re: My 92 died on my this morning... | ||
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Senior Guru
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When my ECM coolant temp sensor went bad it did the same thing....flooded the car (bad, mine wouldn't start) but never threw a code. Sounds like you found the problem.
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Posted on: 2009/10/5 17:33
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´89 Vert, 383, 230/236 cam, AFR 195's, LT Headers, HSR intake, 2800 stall, Zex 200 shot, ET Street Radials, tune by me. Runs were with D36 3.07's. On spray, 10.55 @ 132.78, 1.55 60 ft. On motor, 12.08 @ 113.15, 1.66 60 ft. |
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| MK 82 | Re: My 92 died on my this morning... | ||
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Senior Guru
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My 96 does monitor the oil temp. It will turn the fans on Lo at 270 and Hi at 277. Granted, they would probably already be on.
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Posted on: 2009/10/5 23:51
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| MK 82 | Re: My 92 died on my this morning... | ||
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Senior Guru
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Quote:
I think it is the other way around. I assume you mean while the engine is running. Mine is usually 200 water and 220 oil. |
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Posted on: 2009/10/5 23:54
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| bogus | Re: My 92 died on my this morning... | ||
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Grand Imperial Pooh-Bah
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Quote:
No. The qualifier in that statement is "as things warm." In that condition, as things get up to op temp, the coolant will get there much faster than oil ever will. You are correct that oil will hold more heat over time, tho. |
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Posted on: 2009/10/6 13:57
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| bogus | Re: My 92 died on my this morning... | ||
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Grand Imperial Pooh-Bah
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Ok... new temp sensor... things are ok for now.
I laid some split loom down around the block (the OEM loom was torn up during engine install). We shall see. I need to get into the wiring the right way. |
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Posted on: 2009/10/7 2:16
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| CentralCoaster | Re: My 92 died on my this morning... | ||
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Senior Guru
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I always compare the old and new sensors, you can put them in hot water and measure resistance and compare, then cold water.
Nice to know whether the problem is found or not, although they can be intermittent. It would throw a code though unless it just drifted somehow. |
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Posted on: 2009/10/7 4:33
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| bogus | Re: My 92 died on my this morning... | ||
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Grand Imperial Pooh-Bah
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oh, I was getting codes... and it was more than a drift!
It went from 142, back to 68, up to 130, down to 68 again, up to 100, down to 68, up to 130, down to 54, then sink to "LO." It was a roller coaster ride if there ever was one. |
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Posted on: 2009/10/7 5:03
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| SpectatorRacing | Re: My 92 died on my this morning... | ||
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Elite Guru
 
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Hmmm...but still. Two (c)ensors in a short time? Something else is amiss. They just don't "go bad" that easily.
BTW, you need to change your sig, no more oil leaks. I may soon be there with you, got the pan back on last night. |
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Posted on: 2009/10/7 12:34
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| bogus | Re: My 92 died on my this morning... | ||
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Grand Imperial Pooh-Bah
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Oh, man... the underside was SO dry when I was under there over the weekend... so refreshing.
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Posted on: 2009/10/7 18:18
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| CentralCoaster | Re: My 92 died on my this morning... | ||
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Senior Guru
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I thought you said no codes. Anyhow I was talking about the coolant sensor. The ECM doesnt care about oil temp as far as I know. At least for controlling fuel and spark.
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Posted on: 2009/10/7 19:36
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| anesthes | Re: My 92 died on my this morning... | ||
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Master Guru
 
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Quote:
I've never seen this in any mask. Do you have an example code segment or table ? -- Joe |
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Posted on: 2009/10/8 11:52
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| bogus | Re: My 92 died on my this morning... | ||
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Grand Imperial Pooh-Bah
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I will check the book.
All I know is if the temps are off, the engine will throw a code. I have seen it happen before when my CTS failed a couple of years ago. The oil was cold, about 60F, the engine temp was stuck at 142F and the engine would quit... |
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Posted on: 2009/10/9 0:49
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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