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1998 Ford Ranger Revs high

Tiny
ELIJAHGJOHNSON
  • MEMBER
  • 1998 FORD RANGER
  • 2.5L
  • 4 CYL
  • 2WD
  • MANUAL
  • 80,000 MILES
Truck revs up real high and hangs for a while before returning to regular idle while coming to a stop, depressing clutch, or putting in neutral after being under power. CEL says bad emissions (egr malfunction, vacuum leak, etc.). I have replaced EGR valve, DPFE sensor, IAC valve, and had a vacuum leak test. Problem remains. Does not do it if the IAC valve is unplugged.
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Sunday, December 6th, 2015 AT 12:19 AM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
If it does not do it anymore with the IAC disconnected, try another IAC, if that does not resolve it then most likely you have a failed pcm that is the controller for the IAC.

Roy
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Sunday, December 6th, 2015 AT 7:21 AM

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