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

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Old Sep 25, 2005 | 07:46 PM
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Admrl94
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This will probably be an easy question for y'all to answer:

I've never had problems starting my car before (94 LT1, auto, 36K miles), but lately I have to turn the key, hold it for several seconds and pump the gas pedal for it to start...and then it smells like it's running rich.

Any ideas what's causing this and how much it would be to fix? Thanks!
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Old Sep 25, 2005 | 08:13 PM
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From: Madison Mississippi
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It could be a number of things, lets start off by eliminatiing a few. Does it run OK once you start it? If so, I am guessing that you have a leaky fuel injector flooding the engine after it sits a while. Pumping does nothing to help you, the ECM reads the airflow, temps, 02 levels and adjusts the fuel mixture accordingly, in fact, pumping may aggrevate the start problem. It could be several factors but, tell us more about how it runs, once it starts.
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Old Sep 25, 2005 | 09:21 PM
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Is the starting problem present when the engine is warm and cold??

If only when warm it's likely a leaking fuel injector.
If when warm & cold it's likely that either the fuel rail is not being primed or the prime is leaking down too quickly.
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Old Sep 25, 2005 | 09:25 PM
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Twice the RPMs have stayed at 1500-2000 after starting, but other than that the car drives/idles/feels like normal once it starts.

The typical sequence is turning the key, holding it for several seconds, it starts up slowly with the RPMs quite low, I give it some gas to get the RPMs up and make sure it keeps running because I get the feeling it might not keep going, then everything is normal.

Also, it happens whether the engine is warm or cold. I usually only drive it two-three times per week, and it happens at first in the garage...and then if I go somewhere and park for 15 minutes it happens again.

Hope this helps and thanks for the input.

Last edited by Admrl94; Sep 25, 2005 at 09:30 PM.
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Old Sep 25, 2005 | 11:40 PM
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Sounds like mine when the fuel pump took a dump.
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Old Sep 26, 2005 | 10:41 AM
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Could be the IAC needs a good cleaning.
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Old Sep 26, 2005 | 07:00 PM
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Thanks for the info. Hmm, hopefully this won't cost too much.
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Old Sep 27, 2005 | 11:03 PM
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FYI. Took it in today and:

Oil change (pre-scheduled) + new fuel pressure regulator + labor = $273.

I belong to a local Corvette club that gets me a steep discount at our sponsoring dealership AND had a $10-off-service coupon. Could have been worse without those two benefits!
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Old Sep 28, 2005 | 12:26 AM
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Hate to tell you this but I did the same and it cost me $60 DIY and it was not a hard job at all.It pays to get a FSM and learn to work on your own car especially on the easy stuff and FPR(which is what I would have thought was your problem) and oil change are very easy.
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