LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Rough idle, hesitation etc

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Old Apr 1, 2008 | 04:57 PM
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Ok latest update! I am pressed for time so I only replaced the #7 spark plug wire with the Taylor OTVC kit, which worked and is an awesome kit btw. So no more misfirings on #7. Then I took it for a test drive, ran fine, had it parked for 10 minutes and then tried it again. No such luck it backfired, rough idle etc until eventually it would not crank at all. So I remember reading about others having heat soak problems with ICM. For sure! I let it sit for 4 hours till cooled down and it ran beautifully again. Today I replaced the ICM, did the spacer mod from shbox and it runs awesome!! One small problem remains, in stock programming the cooling fans do not come one at all, I checked the fuses and the relays and they are fine. I upload the hypertech program to the computer and the fans come on no problem. Any idea what Hypertech does different then stock? Thanks for all the help!!
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