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

96 corvette starting issue when hot

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Old Aug 8, 2012 | 11:11 PM
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Default 96 corvette starting issue when hot

I have an issue that maybe you guys can help me with. My vette seems to start up just fine when it is cool and sometimes when hot. But sometimes, I will go and start it, it will start then shut off. It will crank over but no start. I will have to let it sit sometimes over night then it starts up again just fine. I have replaced so far the coil, battery, fuel pump. I have not driven it since the fuel pump replacement. I am replacing the starter over the weekend. Has anyone come across this? Thank you
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Old Aug 8, 2012 | 11:15 PM
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Originally Posted by dcidave
I have an issue that maybe you guys can help me with. My vette seems to start up just fine when it is cool and sometimes when hot. But sometimes, I will go and start it, it will start then shut off. It will crank over but no start. I will have to let it sit sometimes over night then it starts up again just fine. I have replaced so far the coil, battery, fuel pump. I have not driven it since the fuel pump replacement. I am replacing the starter over the weekend. Has anyone come across this? Thank you
Starter has nothing to do with it. You're wasting money.

I'd check for fuel in the vacuum line that goes to the fuel pressure regulator on the intake manifold. If there's fuel in the line, the regulator is bad.

The next thing would be to check for spark when it cranks but will not start. Since it only happens when hot, that could mean the ICM is bad.
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Old Aug 8, 2012 | 11:21 PM
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Thank you for the reply. Do I check the vacuum lines when it won't start or can I check them after I drive it?
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Old Aug 8, 2012 | 11:23 PM
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Originally Posted by dcidave
Thank you for the reply. Do I check the vacuum lines when it won't start or can I check them after I drive it?
You can walk out to the car and check it now. If the FPR is bad, it's bad and it'll have fuel in the vacuum line.
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Old Aug 8, 2012 | 11:24 PM
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Thank you. Is it easy to find on the manifold?
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Old Aug 8, 2012 | 11:29 PM
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Originally Posted by dcidave
Thank you. Is it easy to find on the manifold?
Driver's side rear. One vacuum line running to it.
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Old Aug 8, 2012 | 11:32 PM
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Thank you. I will check it in the morning and post my findings
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Old Aug 9, 2012 | 07:13 AM
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OK. I checked the vacuum line and found no gas in it. I will check for spark the next time I take it out and it doesn't start. Thanks for the help
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