C4 General Discussion General C4 Corvette Discussion not covered in Tech

My mechanic is confused.

Old 04-12-2019, 11:35 PM
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Default My mechanic is confused.

My 1996 corvette died in traffic. My very good mechanic has replaced the fuel pump and distributor and has it running. But it takes a long time to get started. He needs to “grind it a long time to get it started”. A friend says maybe it is the ignition coil. Sorry I have no clue what is wrong with my corvette,
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Old 04-12-2019, 11:37 PM
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Throttle position sensor did that on my 95. One time I spent a half hour on the side of the road trying to start it. Finally called a tow truck and got it home. He rolled it off and the damn thing started right up.


Last edited by Aerovette; 04-12-2019 at 11:39 PM.
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Old 04-13-2019, 08:15 AM
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I assume you replaced plugs and wires recently as well? It may be a failing TPS sensor also I would replace the ignition coil and Igbition Control Module and start from there it may also be a weak or bad injector...
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Old 04-13-2019, 08:59 AM
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Check fuel pressure bleed down rate.
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Old 04-13-2019, 12:33 PM
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Could still be a defective/bad OptiSpark, or plugs and wires

Last edited by RetroGuy; 04-13-2019 at 12:35 PM.
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Old 04-13-2019, 01:34 PM
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Sounds like you need a new mechanic instead of one shotgunning parts.
instead of throwing out random guesses you need someone to properly troubleshoot it.

Last edited by slow_zo6; 04-13-2019 at 01:35 PM.
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Old 04-13-2019, 04:30 PM
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St. Jude Donor '05

Is he paying you the $100 an hour hes probably charging you to guess? I swear....
A simple fuel gauge and test light can solve this lil mystery. Keep us posted.
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Old 04-13-2019, 05:04 PM
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"Grind it a long time"

Yeah you need a new mechanic.
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Old 04-13-2019, 05:21 PM
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Originally Posted by PatternDayTrader View Post
"Grind it a long time" Yeah you need a new mechanic.
He's already sold you a new fuel pump and a new distributor? What's missing? It's really, really basic! Spark, fuel, compression, timing . . . and the engine will RUN!!!

I hope you saved your old (maybe good) parts!

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Old 04-13-2019, 10:19 PM
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Codes? How does it run?
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Old 04-14-2019, 12:54 AM
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St. Jude Donor '05-'06, '16, '17-'18-'19

Confused and mechanic in the same sentence is rarely a good thing.
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Old 04-14-2019, 06:52 AM
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Originally Posted by bbwool42 View Post
My very good mechanic...
I'm with everyone else, I question his skill...we're not talking rocket science...it's a chevy V8 Small Block Engine, been around for decades.

Last edited by bac22; 04-14-2019 at 06:53 AM.
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Old 04-14-2019, 11:32 AM
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Originally Posted by slow_zo6 View Post
Sounds like you need a new mechanic instead of one shotgunning parts.
instead of throwing out random guesses you need someone to properly troubleshoot it.

Your "very good mechanic" may be great at replacing parts, but he's a failure as a troubleshooter. Find somebody who knows how it's done. Preferably somebody who knows the peculiarities of the C4 LT1/LT4 Corvettes.

Live well,

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Old 04-14-2019, 01:41 PM
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Given the '96 has OBD II he should be able to track down the issue(s) with basic mechanic trouble shooting skills AND technology....
Time to find a real very good mechanic!
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