The following is a problem I had with my 93 wanting to drop to 500 rpms and die while driving or parked. The ICM was showing as bad on the diagnostics that the shop ran, but 3 months later, the same problem was occurin again. This time, the code was still the same, but they said one or both of the coil packs could be causing the ICM to go bad. I replaced both coil packs and ICM and it has been fine now for 4 days. Parts were only $337.00:eyepoppin . Will be finding out tomorrow what the shop bill is, I'm afraid I don't want to know. Anyways, If your ICM goes bad, it might not be a bad deal to spend another $120 to replace coil packs too. My pony has 80,600 on it now and this has been the most expensive engine repair yet. I hope this post helps someone else when their pony wants to just die when rpms' drop.