So i have no spark, and really just lost on what happened to cause this. Heres the history originally about 6 months ago my 98 4door jimmy started killing coil packs 1 a month, but everytime you would throw in a new one it was fine after the 3rd or 4th coil pack i changed the pigtail, and was fine for about 2 or 3 months. Now about 5 days ago i was driving down the road and the motor just cut off, figured no spark change the coil pack no big deal, go to start it up after i change the coil and still no spark. So far i have tested or changed the coil pack with a brand new one, Ignition control module, the camshaft position sensor, the crankshaft position sensor, plug wires that needed changed anyway"ac delco wires", And still i am yet to get a stitch of spark, what am i overlooking i have no check engine light on, or no codes even stored. Not really sure where to go from here, The motor is a reman so theres only about 40k on it, so im about 99% sure its not things like a broken timing chain, Lobed cam etc etc. Also the security light is going off as it should, no passlock engaged, thanks in advance for any help or suggestions

 

Have you checked all of the wires to the CMP, CKP, ICM, & the coil?



If the CKP isn't communicating with the PCM, there will be no spark.