2005 Ford Expedition Having idling issues

Tiny
SCRAMBLEDEYES14
  • MEMBER
  • 2005 FORD EXPEDITION
  • 5.4L
  • V8
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
Motor will stall when put in gear and sometimes when revved up just idling in park.
Thursday, November 26th, 2015 AT 5:57 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Check idle air control valve (IAC). The IAC is responsible for maintaining the engine idle speed. Also, a common problem with the 5.4L is vacuum leaks. There is a vacuum line off the rear of the throttle body which has a 90 degree elbow in it. The elbows are common to dry rot and leak. Check that too.

If the vehicle hasn't been tuned up in some time, that could be a consideration too. If the check engine light is on, let me know what codes are in the system.
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Thursday, November 26th, 2015 AT 7:25 PM

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