OK I have a 95 2500 w/5.9 gas. new intake gaskets head gaskets TPS IAC MAP 02 sensors timing chain cat back exhaust in other words alot of new parts on this old truck. It runs great till it warms up then it backfires and will barely get outa its own way. No codes present. I also have a new crank sensor cam snsor wires plugs cap and rotor. Even went as far as changing the pcm with a used one from the junk yard all with the same results.Anyone have any suggestions as to what the hecks goin on with this thing. Timing is set injectors are working ran every kinda test I can find without a scope I can from home. Too far to dealer without towing it to go to get it checked out there All this started last summer when for no reason no spark no injector pulse. Started testing then and finnaly after some work found the crank sensor to be the culpret, but this new problem just started.
abought ready to go back to dare i say it a chevy lol.

 

Temp sensor

 

Did you by OEM crank sensor or aftermarket crank sensor? I replaced mine with Napa sensor. Then after 2 weeks when you first start it up when it was cold it would just shut off within 15 minutes no codes at all. Then you could go on your way and shut it off and start it up as much as you wanted as long as it didn’t completely cool down or it would do the same thing. Finally last Monday it shut down twice within just of few seconds and it finally thru a code p1391 (loss of crank or cam signal).
I ordered OEM from http://moparonlineparts.com/ put it in Wed. and haven’t had any trouble since.
There is lot of discussion on here about crappy aftermarket crank and cam sensor issues.
Yes Napa gave me my money back on the sensor.
Dave