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The van was being driven at highway speeds when it suddenly stopped. There was fuel in it and the fuel pump operation was verified. The coil wire was removed, engine cranked over, no spark. Coil wire was tested and had 7100 ohms. Replaced the coil still no spark. what now?

My 92′ Olds with a 3.1 v-6 starts and runs fine for a few seconds, then it hesitates, misses, gets worse then dies.

I replaced :

Fuel Filter, Fuel Pump, Removed and cleaned all carbon from EGR and replaced it, separated exhaust from catalytic converter,

and installed a new Crank Position Sensor. I fired it up and same thin still happens! Is it possible timing chain/belt? (does backfire at higher rpm before stalling). Could it be a Cam sensor? or can a faulty coil pack be the culprit? how can I test and eliminate these possibilities? or is there something I may have missed?

i got a 98 chevy s1 blazer 4×4 4.3L V6 and while i was driving when i would give it more gas it would start bogging down like it wasnt getting any gas to the egine then it drove fine for a few more blocks and started doing it again and then it died. Fuel pump maybe?

I have a 03 Chevy Blazer 4.3L Vortech 4X4 automatic. It has just recently strated to idle rough and has died on me twice now. There are no warning light on either. Any ideas?