IDLE SURGES UP AND DOWN

2003 Ford Expedition

Tiny

jesusmancilla

September, 16, 2012 AT 7:45 PM

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 !

2 Answers

Tiny

ASEMaster6371

September, 16, 2012 AT 7:55 PM

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

Tiny

Dynamatech

September, 23, 2012 AT 5:38 AM

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

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