Power Cummin

Thank you Sir! I guess its time to save some money and take it in to the dealer.

I did that with my multi meter at the Apps and at the pcm and it reads good at both places with the key on not running and when it is running it reads good yet the engine still revs erratic sometimes revs slow.

I have since returned everything back to factory. My APPS tests goods but is still throwing the code. ive tested the voltage at my map sensor and it 4.97 volts.

Did you figure out what the problem was? Im going though the same thing.

2002 dodge 24V 275000 no blow by I just got the truck a couple months ago. It had an edge juice on it at one time. It was removed before i bought it. Right after i got the truck it started acting up some times it would start other times it wouldnt. I ran some tests and the blue with a red tracer wire to the vp44 had power when trying to start the truck. It shouldnt so i cut it. All was fine and fixed. 2 weeks ago im driving and get dead pedal sometimes it would rev ok then it wouldnt. Put my code reader on it got 1 code p0122. So i replaced the APPS sensor. Ive tested the new APPS and its working perfect. Did not fix the truck. Did the key trick got 2 codes P0122 P1475. Ive tested the wiring harness for shorts and didnt find any. I tried adding a ground to the vp44 harness and wired it direct to the pcm and nothing changed. Ive also test fuel pressure and its good. Im lost!