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86 Corvette Won't Start Sometimes after Sitting

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Old 07-26-2017, 04:00 AM
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mikemully
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Default 86 Corvette Won't Start Sometimes after Sitting

car sits for 4 or 5 days then won't start. had the starter and battery replaced. alternator is fine. could it be the chip in the key or wiring. any help appreciated thank you.
Old 07-26-2017, 04:59 AM
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hcbph
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It would help to have more details. Automatic or Manual tranny? Does the car turn over but not start or not turn over at all? Have you checked for spark? Have you checked for fuel pressure? Do you get a SES light?

The more details you make available the better chance someone can help you.
Old 07-26-2017, 08:36 AM
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81c3
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Sounds like a fuel delivery problem... check fuel pressure.
Old 07-26-2017, 09:08 AM
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Originally Posted by 81c3
Sounds like a fuel delivery problem... check fuel pressure.
Not so sure on that without more details. OP referenced starter, battery, wiring and a couple more. Not enough details to my thinking to help out, which is why asked for more info.
Old 07-26-2017, 09:19 AM
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mickey5
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VAT problem? The earlier Vettes seem more prone to this pita.

Last edited by mickey5; 07-26-2017 at 09:21 AM.
Old 07-26-2017, 02:45 PM
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Originally Posted by hcbph
Not so sure on that without more details. OP referenced starter, battery, wiring and a couple more. Not enough details to my thinking to help out, which is why asked for more info.
"won't start" is about as vague as one can be.....
Old 07-26-2017, 03:12 PM
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mikemully
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thanks for the replies! its an automatic. it will not turn over at all. have had the fuel pump replaced recently also. lights and radio turn on. after a jump it runs fine. guess its a bad starter?
Old 07-26-2017, 04:18 PM
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Jumps fine?

Starter and Batt replaced recently and the problem still exists? Starter solenoid also replaced? A good starting point is to remove, clean and retighten all the grounds and cable ends for the starter circuit. Check for resistance using a DVM. You might also try attaching a makeshift ground from the batt ground to the starter ground/frame using a jumper cable.
Old 07-27-2017, 03:19 AM
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appreciate all the replies. thank you all! anybody recommend a corvette expert in san diego let me know. again thanks.
Old 07-27-2017, 06:15 AM
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Originally Posted by JrRifleCoach
Jumps fine?

Starter and Batt replaced recently and the problem still exists? Starter solenoid also replaced? A good starting point is to remove, clean and retighten all the grounds and cable ends for the starter circuit. Check for resistance using a DVM. You might also try attaching a makeshift ground from the batt ground to the starter ground/frame using a jumper cable.
This is a good starting point IMO.

If the starter doesn't click or anything but radio, horn etc work it sounds like you may have a parasitic drain going on. Here's something you can try: drive it or charge it to full charge then unhook the battery and let it sit for 5 or 6 days. Hook the battery up and see if it starts. If it doesn't I'd concentrate on the possibility of the battery being bad. If it does start then I'd start going through the various circuits and see what's sucking the battery down. You can check things using something like this tool which plugs into the fuse block and shows draw on each circuit. Just be sure to account for any lights that might turn on when you open the hood or doors.

I chased one at one time that turned out to be something was pressing down against the seat adjuster lever causing the battery to run down in a few days. It was controlled by a circuit breaker in the fuse block so it didn't blow up the fuse.

Hope that helps. Good luck
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