2003 Ford Expedition Truck hesitates & stalls

Tiny
TCO22
  • MEMBER
  • 2003 FORD EXPEDITION
  • V8
  • 2WD
  • AUTOMATIC
  • 81,000 MILES
My 2003 Ford Expedition hesitates & stalls. It started hesitating about 7 months ago, I at that point changed the plugs & boots. This seemed to work for about 5 months. But about 2 months ago it started hesitating again, because I have been tight on money I have not been able to bring it some where for it to be looked at. Now the truck stalls while driving. Could this be the plugs or coils?
Friday, February 5th, 2010 AT 7:39 PM

1 Reply

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Is the check engine light on? Autozone reads the codes free, post all found.
You may have a vacuum leak, get a can of spray gumout, spray the vac lines and maniflod area, when the idle changes, youve found the leak! You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs! If that doesnt do it, you may need a new idle air control valve, it's bolted to the throttlebody
Fords tend to leak vac at the PCV rubber elbow spray around it, Ford sells the elbow. Keep spray off the exhaust manifold.
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Friday, February 5th, 2010 AT 7:53 PM

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