Could be the ICM along with many other things. Testing components and checking connections is all I can suggest. Make sure your ECU plugs are all pushed in all the way, no wires came out of the plugs, the ground is hooked up. Look at check engine light operation. Check the main relay by listening for it to click after cranking and or unbolting it and taking the cover off. Test the ICM and both sides of the coil as described in the FSM. The dizzy could be a problem too...


1990 LWB RS A/T
1990 LWB Base A/T
1991 LWB LS A/T Going...Going...