Question about 1992 Chevrolet Corvette

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1992 corvette. sometimes starts and sometimes not.

Will not crank and battery tests good. other times it fires right up. never know when it will happen.

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  • its420_us May 11, 2010

    Your issue sounds like a bad ground to me. Start by cleaning your connections at the battery, then the ground to the engine and/or frame.



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You seem to have a dead spot on your starter.
you might want to try that. but before make sure
your battery terminals are clean and alternator
is charging


Posted on May 10, 2009


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You may need a shop manual to get the test procedures.
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I have a 1989 corvette with greenwood package that cranks for about 50 seconds before it will fire, runs at a ruff idle, and after it is hot and running for awhile it will shut off and be really hard to...

The only part that would come to mind after all of this would be the fuel pump relay. This is located on the fire wall on the drivers side of the car. When that goes bad it does not allow for adequate fuel to cycle through.The other thing would be timing. You need fuel air and spark for the vehicle to fire. After all the test and after replacing the fuel pump relay. I would do a compression and a leak down test. Are you sure that the timing did not jump a gear? You can also look and test the IAC (Idle Air Control) or the MAF (Mass Air Flow Sensor). Also do a test to check fuel pressure. The last Corvette that I worked on personally that had this issue it turned out to be the Fuel Pump Relay. Good luck let me know if you have any further questions.

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Try checking your cam sensor and crank sensor. You can test them with a voltage meter. Many times, the sensors will go before anything else. It may be your distributor itself. Test it as well. If you have a question, please let me know. I am here to help. Thanks for using FixYa. Have a good evening.

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I have a 1973 corvette with a 350. The starter does nothing sometimes, and other times it works fine. It is in the 'does nothing' mode now. I think either a loose connection somewhere or auto tranny...

Put it in nuetral. If it still does not start smack the starter a few times with a hammer. If this causes it to start, replace the starter. If you jump the starter at the starter this will tell you its a starter problem since your bypassing everthing.. Also on a car this old you may have dirty battery connections or a weak ground cable. In order to to a quick test on the ground cable use jumper cables hooked from the ground terminal to the engine or clamped right on the starter body. If it now cranks i would suspect cable issues.

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I have a 1984 corvette. If I jump it , it will start and within 10 seconds shuts off. My brother said the radio would not shut off so he pulled what he called a relay. I can not find a relay any where on...

Start with the battery and have it tested for integrity. Make sure it has good standing(12.5v) voltage and good cranking voltage(the battery voltage should not drop below 10.5 volts). If the battery drops during cranking, either the starter has an issue internally or (most likely;) the battery has a short internally and should be replaced whether it is new or not. When the power source has been deemed good, have the charging system tested for anything above 13.7 volts(these should have right around 14.5v). If this is good, let me know and we can troubleshoot elsewhere.

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Try turning the key to the on postion-not crank, just to he postion right before cranking. leave it in that postion for 15 min, Do this three and after the third time go ahead an try to start it. Hopefully this will reset your security for you.

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There is a series of two videos addressing a very similar problem with a 1989 Corvette, first one diagnosis, second one fix. Seems like this is a not unusual problem for these older Corvettes. Check out the links.
Chevy Corvette No Start When Hot The Diagnosis
Chevy Corvette No Start When Hot The Fix

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1 Answer

Sys light comming on

SYS means that there is a malfunction and that it's registered in the car's computer. You need to have the system tested for fault codes.

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