Not too long ago my car started to have an intermittant miss while driving. Sometimes it was a harder miss than other times. The problem got progressively worse. Eventually it got to the point where the car would stall out when stopped at light but would always start back up. The problem at first seemed to occur after the engine got to operating temperature. I had a similiar problem in the past and had replaced the ignition control module so since it had a lifetime warranty I decided to replace it. Did not help. After doing some reading online, I decided to replace the crankshaft position sensor. During my test drive it seemed to work good until (several miles down the road) it started acting bad again and stalled out. This time my car would not restart and acted like it had either jumped timing or broke the timing chain. I had to have in towed to my house on memorial day weekend no less (extra charge)That night I decided to see if I could determine if I had a timing issue and the car started right up and ran fine like there was nothing wrong with it. I let is sit for a day or two and came home from work to start troubleshooting it. There were no codes in the ecm and the data stream looked good, saw nothing abnormal while the car was running. The next day I came home and this time the car would not start at all but when cranking the engine turns over good. I thought maybe is was coincidence that the engine was hot. I started to troubleshoot and found that I had no spark to the plugs. I checked to make sure I had a good power and ground to the ignition module, made sure the crank sensor wiring was transmitting its AC voltage to the ignition module. Removed one of the coils and checked for trigger voltage and found none. Removed the ecm and performed resistance check on all wires leading to control module. When I plugged the ecm back in the car started fine but after a few minutes would start to run rough and die. I even checked the one coil I removed to make sure it wasnt open. I replaced the ecm. With the new ecm my car still acts like its out of time but I do have spark this time. I also notice that it smells like its overfueling too. I thought I bought a defective ecm so I exchanged it. Same problem. I am at a total loss at this point. I have checked or replaced everything I could think of that may be causing this problem. If anyone has any idea what is wrong please let me know. I have always been able to fix my own vehicle up to this point. The sad part is I am a diesel mechanic by trade. This problem is blowing my mind. I am gonna hook the scanner to it tonight again and see what I can see... Thanks for any help out there. :banghead:

If fuel pressure consistent?

Have you tested injector solenoid resistance, both cold and hot? The Multec injectors used in that era are highly suspect.

I realize neither of these would affect the "no spark" condition, but you may have multiple problems.

As for the lak of spark, the ICM and ECM control the individual coil firings. Have you tap tested the ECM?

I havent checked the injectors, I dont believe it has injectors problems. I checked the fuel pressure according to the book and it is consistant with a slight drop while cranking which tells me at least the injector as working. The engine runs great once in a while as if nothing wrong with it so if it was an injector problem they would have to be all going out at the same time. When I crank the engine it sounds like its fighting itself to turn over. Almost like the timing is off so yesterday I double checked to make sure that all the plugs wires were connected correctly which they were. I then removed all the wires from the the coil packs and turned the engine over. It turns over smoothly so that tells me there is a spark timing problem. I dont know what is causing it. I have replaced the ignition control module, crank sensor, ecm, the coils are firing good and strong and are not shorting. I've read that the the ecm in my vehicle has a high failure rate after 10 to 15 years and the only part I have not replaced is the EPROM. I know the EPROM has the programming to tell the engine how to work and Im wondering (if damaged in some way) if it is causing the spark timing issue. I am thinking of going to the junk yard and getting one and trying it.