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

No spark! 1993 LT1

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Old Jun 22, 2013 | 05:04 PM
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Default No spark! 1993 LT1

Went to start the car this morning and it cranks but will not start. Checked spark and I have nothing! I have power to the coil and ignition module. The Optispark unit is < 1 yr old. HELP

Last edited by zilla24; Jun 22, 2013 at 09:19 PM.
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Old Jun 22, 2013 | 05:30 PM
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check out this video..

http://www.youtube.com/watch?v=lFCja...ature=youtu.be
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Old Jun 22, 2013 | 05:39 PM
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do you have spark coming off the coil?

Check the coil wire?

DuraSpark? What's that?
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Old Jun 22, 2013 | 06:15 PM
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I meant Opti Spark bogus. Im all kinds of upset right now about this.
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Old Jun 22, 2013 | 07:03 PM
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I get 12 volts on the coil post and approx 20 volts when I crank it over
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Old Jun 22, 2013 | 07:44 PM
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you should check for codes,,

http://tech.corvettecentral.com/2011...trouble-codes/
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Old Jun 22, 2013 | 08:19 PM
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sounds like the ICM take it down to Napa they can test it for you.
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Old Jun 22, 2013 | 09:16 PM
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Well I checked codes. Nothing. Went through voltage checks and all looked good. Checked harness going to distributor, all good. Re-seated the distributor plug at the mainfild and it started. Now Im confused. Possible bad plug conection?

Drove it for a few miles and it shut off once started right back up.
Now Im scared it is going to leave me stranded!!

I did intake gaskets last week and I think maybe I did not plug the distributor line back tight?

Last edited by zilla24; Jun 22, 2013 at 09:21 PM.
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Old Jun 22, 2013 | 09:17 PM
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higgyburners....Is thet ICM or ECM?
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Old Jun 30, 2013 | 09:00 AM
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Swapped ICM (Ignition Control Module) and coil again. Still intermittant spark. Could the PCM/ECM be crapping out? Suggestions on where to get one or do I have to get mine rebuilt?
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