Idle surges up and down

Tiny
JESUSMANCILLA
  • 2003 FORD EXPEDITION
  • 121,000 MILES

I own a 2003 ford expedition 4.6 2wd the idle surges up and down and is idleing high. Replaced the idle air control unit and maf sensor and have taken off the throttle body and cleaned it. I have disconnected the idle air control unit and it runs fine. I dont know where to go from here any suggestions !

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Sunday, September 16th, 2012 AT 7:45 PM

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Tiny
ASEMASTER6371
  • EXPERT
  • 25,517 POSTS

Runs fine? The idle is very low about to stall? Thats where it should be with it disconnected.

I would look around for a vacuum leak. Pcv hose is real common

Roy

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Sunday, September 16th, 2012 AT 7:55 PM
Tiny
DYNAMATECH
  • MEMBER

I would look into the throttle position sensor. I have had that problem a lot with fords. Good luck!

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Sunday, September 23rd, 2012 AT 5:38 AM

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