ultra 94 z

iTrader: (2)

Guys need ur help just bought a 94 lt1 trans am and it will not start! Checked it for fuel pressure has fuel pressure key on when cranking looses pressure has no spark at spark plug and no spark at coil also has no injector pulse! So far I have checked all fuses and all our good! Looking at the opti spark it looks like it has been replaced and it has a red cap! Any suggestions or where to go in a direction would be great! Thanks for the help in advance

ultra 94 z

iTrader: (2)

All these views and no help? Come on fellas ,

ChevyOwner

I would have the ICM tested.

I have an idea for a cheap ICM replacement, but I have no way to test it.

cardo0

How come no one bothers to read their DTCs - diagnostic trouble codes - but thinks we can help them more over the internet?

Low fuel press when cranking but no spark? Tells me the starter gets power but both fuel sys has leak and ign is dead. Do u want to replace them both or maybe get a code scanner?

cardo

SS RRR

iTrader: (2)

http://shbox.com/1/4th_gen_tech2.html#opti_test

ahritchie

iTrader: (1)

^Good point, I didn't realize the opti can cause no injector pulse, learn something new every day! OP, go AC delco or MSD, none of that autozone Chinese crap to save a few bucks....if you already had a red MSD like you mention and it did take a dump, go AC delco....I have a MSD on my car (no problems), however, it's only got 5K miles or so on it so not sure how they hold up longevity wise.

ultra 94 z

iTrader: (2)

I know I need to check for codes finally got as
Scanner will be checking for codes tomorrow! Does any one know if a bad Icm will cause no injector pulse?

ChevyOwner

No, the ICM only controls the coil for the LT1.
I had missed the no injector pulses. I would start by testing the opti.