LT1-LT4 Modifications 1993-97 Gen II Small Block V8

I hate my car, 2 Optis still no spark... WHY!!!!

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Old 10-25-2008, 01:01 PM
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holy butt secks!!!
Old 10-25-2008, 01:17 PM
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I can get voltage to read them and the connectors look fine.

I have 12v on the pink which supposedly means the coil is bad and I have no pulsing ground on white black which supposedly means the icm is bad... I have fuel I can smell it.

Just no spark.

Last edited by Cross; 10-25-2008 at 02:02 PM.
Old 10-25-2008, 01:56 PM
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Try using another pcm just for ***** and giggles. Maybe you fried it if you had something wired wrong???
Old 10-25-2008, 02:02 PM
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Better not have its the new one from MadZ28. I put it in thinking maybe the other did but I am sure I found the issue now.

A local friend looked at his Trans Am (95) and we went over grounds etc and as someone told me and I just could not understand why they would have voltage.

These wires are a ground: (Two Tan w/White Stripe and a Black)

However they seem to carry voltage.

I did the test before and the black has 12V as soon as the car is turned on.
The Tan/ White has 6.5v when cranking...

So I am going to look at his or find pictures of someone elses to see how they should have been grounded since mine seem to have no connectors. Then I will copy it and try it and I am sure it will magically fire... and I will have to thank that member who told me they were gorunds and I just had a bad opti before.
Old 12-17-2008, 12:56 PM
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any updates?
Old 12-17-2008, 02:29 PM
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Did you find the problem...
Sounds like the same damn problem I am having with my brothers LT1..
Old 12-17-2008, 11:37 PM
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do you have a trouble code?
if not i could imagine that one teth of the timming chan jump and doesnt get the right time to start
Old 02-20-2009, 06:34 PM
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so what fixed it?
Old 02-20-2009, 07:39 PM
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Grounding issues & Moisture in the Cap, everything is fine but selling to go to lsx.

Last edited by Cross; 02-20-2009 at 08:08 PM.
Old 02-20-2009, 08:20 PM
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was it the tan/white?
Old 02-20-2009, 09:35 PM
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Did you try replacing the opti harness? Not sure if I over read that in a previous post or not?
Old 02-21-2009, 11:18 AM
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MSD has its own new harness I just did not know you needed to add the rubber o-rings yourself...

Tan white both should be grounded.



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