link below details how to check out the igm module.
http://www.camaroz28.com/forums/showthread.php?t=601565
Couple other things:
Check the coil wire as well. They tend to corrode and cause issues. you can also try running a seperate ground wire from the coil mount to the frame grounding point. I chased the same problem on my car for months, sent the excel ign system back twice, added a second ground and never saw the issue again.
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93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
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