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Cat Lift Trucks (& Caterpillar) P5000:
runs rough at speed

Hey folks,
Got a P5000 Serial: AT3501175 with a K25L nissan engine.

It will start up and idle okay, and if you slowly advance the throttle it will got to full speed, but if you hit the pedal fast (as an operator does) it falls on it's face and studders and stammers all over its' self.
I've got NO CODES. It does have aftermarket (S**T) coil packs BUT, it will accelerate to full speed if you accel slowly. New OEM Cam and Crank sensors.
I appreciate your help!
Kirk
  • Posted 6 Oct 2015 03:57
  • Discussion started by kirk_t
  • Colorado, United States
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Showing items 1 - 3 of 3 results.
there is also a 'learn' procedure (idle air vol) that requires the 'diagnozer&tm software', but this sounds like a faulty assistant injector. I would be tempted to swap a known good assistant injector to test. and their might also be a 'last chance' screen in the throttle body that can get clogged up.
  • Posted 6 Oct 2015 21:01
  • Modified 6 Oct 2015 21:02 by poster
  • Reply by edward_t
  • South Carolina, United States
"it's not rocket surgery"
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Check the assit solenoid its what its for they do stick also if its the older model they used to have a guze filter in the the manifold not fitted anymore alan
  • Posted 6 Oct 2015 05:09
  • Reply by alanmitsi
  • essex, United Kingdom
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Could a faulty injector cause this?
  • Posted 6 Oct 2015 04:59
  • Reply by kirk_t
  • Colorado, United States
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From the forum discussions …
"Remove the coils and ohm out the pins. Coils take a different number than regular 4y plugs... If code is there then it is an ecu issue."
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