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Runs rough, Dies in gear, hard start

830 views 2 replies 2 participants last post by  StrokinRyan 
#1 ·
2002 F550 Class A Tow Wrecker has 281564 MI and had all 8 injectors replaced a year ago. I just replaced all the GP, UVCH, and Main engine wiring harness, to no avail. Before it wouldn't start at all, now it will start and lope horribly. Once I hit the accelerator, it will idle with no lope, but rough. If I un-plug the ICP sensor, it will start easier, but still has no throttle response, and will die once in gear, and runs rough. I ran a Inj. Buzz Test and get P1292. Any ideas? Thank you in advance!
 
#3 ·
I have a new ICP on the way, should be here tomorrow. I have not tried the CPS, the digital RPM readout on the PTO controller is not erratic, and reads like it always has, neither is the dash. I warmed it up to operating temperature and no change in the symptoms. If it was the IPR, you would think that it would run differently, correct?
 
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