Replacing the ICM on my 1986 2.8 today
anything i need to know, or tips, etc....never done it before, thanks in advance

 

ICM?

 

Ignition control module, goes in the distributor
https://www.rockauto.com/en/catalog/...ule+(icm),7172

Guessing no spark?

 

I replaced it....have spark, but now popping through carb when I try to crank it...no start

 

Did you properly index the distributor before installing it?.

 

No

 

Do I need to redo it....and if so, how
need to get this fixed, I drive this jeep alot
Thanks again In advance

 

Did you fully remove the distributor from the jeep? If so you'll need to set the distributor timing.

Set the motor to TDC and then drop the distributor in making sure the rotor points at cyl 1 once installed. You may need to involve a timing gun once its running again, i'm not sure how "smart" the 2.8l engine control units were.

If you didn't remove the distributor then check your sparkplug firing order and make sure that's right.

 

So the rotor button end should be pointing towards the number 1 cylinder, not #1 on dist cap
also, do I have to worry about a oil pump rod being stuck in the bottom of the dist

 

pointed at the number 1 cyl on the dist cap. not at the actual cyl in the motor.

as for the oil pump rod, no as long as its engaging the pump its fine.

 

Doing it in the morning, thanks

 

I just re read my thread here, and I did not remove the distributor when I replaced the ICM ... I just removed the cap and rotor.....so no need to pull the distributor out right.....i just dont understand why its popping back through carb and not starting after i replaced the icm

 

This is why I asked ICM?

So, this is a 2.8 V6 with the GM distributor and you replaced the module inside the distributor?

 

Yes, only the mod

 

If that's the case it sounds like the firing order is off. Check the plug order. being off can cause backfires/no starts.