Hello. I have a 1990 350 tbi that runs great cold. After warms up it either dies or will not restart after shut down. Checked both spark and injector spray and nothing from both. Let cool off a couple hours and starts back up and runs fine until it's hot again, then is dead until it cools off.
ICM was replaced and still happens.
Any Help?

 

Might be the EGR valve or bad coil.

 

Thanks for the reply, but why would a bad EGR affect NO spark and NO fuel delivery? And would a bad coil make sop spark and fuel delivery when hot?

 

I believe the problem lies inside the distributor. Check the reluctor, the pickup wiring and I bet the Module has lost it's heatsink film and needs new module and squeeze film. If the cap and rotor are fairly new they may be ok but is a good idea to change if unsure of age.

 

I'm thinking the distributor is junk. It has a new ICM from Autozone, but the distributor itself isn't even two years old and was a cheap Chinese make. I might just replace the whole distributor with a quality make.
Thoughts?

 

Asking? Is there a pickup coil in the distributor? Ignition module as stated may be getting hot without the heat sink paste being gone underneath. My last truck of that "era" was an 82. I replaced the pickup coil as the insulation was old, what a PITA that was, but it wouldn't run at all.

 

The pickup coil, inside the distributor controls the signal for injector pulse, along with the reluctor. The fact that you have a no start when warm leads me to the distributor.

 

Agree with PNW NBS Z71, I opted for a new distributor and never had the problem again.

 

Was your problem the same as mine? What brand new distributor did you purchase?

 

IMO, get a GM or AC Delco part. https://www.rockauto.com/en/moreinfo...=1407&jsn=1407