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Engine revs going up and down at idle then shutting off

Tiny
GCOFF5
  • MEMBER
  • 2003 FORD EXPEDITION
  • V8
  • 2WD
  • AUTOMATIC
  • 126 MILES
2003 ford expedetion eddie baur the service engine light came on and when you come to a stop the idle goes up and down shaking the car and then shuts off
Wednesday, December 29th, 2010 AT 12:16 AM

2 Replies

Tiny
DISCOSTU24000
  • MEMBER
  • 37 POSTS
Have you checked what codes are causing the light to come on? If you have codes P0171 and P0174( system lean banks 1 & 2) then check for a vacuum leak at the back of the motor, there is a 90 degree elbow connected to the PCV hose that leaks, a very common problem on this car
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Saturday, January 1st, 2011 AT 11:43 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Have the computer scanned to identify where the problem is coming from. IT could be a vacuum leak as well as an Idle Air Control valve (IAC).
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Tuesday, March 22nd, 2011 AT 6:31 PM

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