C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Starting problems when engine is warm

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Old Mar 8, 2009 | 04:25 PM
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tlw1965
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Default Starting problems when engine is warm

I have a 1989 Vette Tuned port injection with a 350 automatic. My problem is the car will start fine when engine is cold but once it warms up a for a couple minutes and I turn it off it will not start, will turn over but thats it. The only way it will start if I spray some carb clener into the carb. I have changed many sensors and i have put it on scanner and comes back clean no defaults or codes. Any help would be appreciated.

Thanks
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Old Mar 8, 2009 | 04:27 PM
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Ohm check your injectors.

http://forums.corvetteforum.com/c4-t...questions.html

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Old Mar 8, 2009 | 04:49 PM
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Can I have your # so I can call you about this?
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Old Mar 8, 2009 | 11:20 PM
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Originally Posted by tlw1965
I have a 1989 Vette Tuned port injection with a 350 automatic. My problem is the car will start fine when engine is cold but once it warms up a for a couple minutes and I turn it off it will not start, will turn over but thats it. The only way it will start if I spray some carb clener into the carb. I have changed many sensors and i have put it on scanner and comes back clean no defaults or codes. Any help would be appreciated.

Thanks
Sounds exactly how my problems started. I now believe it's my original injectors that were never ethanol compliant and am about to replace them. Check the first posts here by Jon of FIC - fuel injector connection. He has several posts here about this very issue. Since my problems started last October I've learned more than I ever wanted to about fuel injection and fuel itself - standards lacking thereof. Good luck. My believe is that the original Multec injectors are not ethanol tolerant so might as well replace them at the first opportunity.
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Old Mar 9, 2009 | 10:15 AM
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mine does that, only doesnt start after a short trip say 5 - 10 mins but other than that starts and stops fine
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Old Mar 9, 2009 | 10:26 AM
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Originally Posted by riksdodgydeals
mine does that, only doesnt start after a short trip say 5 - 10 mins but other than that starts and stops fine
I first became aware of the problem last Oct. i had just filled it with Hess Premium (ethanol), drove around doing errands trips of 10 to 30 miles never a problem. Then I stopped at a hardware store in my town - she wouldn't start - even after repeated tries. Walked home (memories of the Fords I've had) got the Jeep and came back, picked up my shopping stuff, had to repeat the trip 3 times over 6 hours before she'd start. Drove it straight home and walked back to get the Jeep. Haven't driven it since due to weather. This was on a Sat eve. lotsa luck if I'd been stranded out of town - the AAA doesn't have a flatbed, and we don't have cabs. I have no idea what I could have done. No garage open after 5 on sat.
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Old Mar 9, 2009 | 02:51 PM
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had a ford orion that done the same thing!
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Old Mar 9, 2009 | 05:01 PM
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Get the injectors tested or do it yourself. Buy from Jon at FIC. Hes the man!
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Old Mar 9, 2009 | 05:28 PM
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Forgot to mention one thing, that my exhaust also turns red on the back side of the resinators, I am running straight pipes no mufflers.
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Old Mar 10, 2009 | 01:05 AM
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Sounds like you have one or more leaking injectors. See posts by Jon at FIC for some useful insights. It would also be a good idea to thoroughly clean the throttle body valves and the MAF sensor with the appropriate cleaners.
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