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2001 Ford Expedition Engine surge

Tiny
HOWARD74
  • MEMBER
  • 2001 FORD EXPEDITION
  • V8
  • 2WD
  • AUTOMATIC
  • 22,000 MILES
When engine is cold it surges (not like a miss) for about 2 miles. Then it immediately stops surging and runs very smoothly from then on. No engine light on. Does not feel at all like a defective plug coil as I have experienced that type of miss on several occasions when different coils have been defective over the life of the car. What causes the surges?
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Tuesday, September 9th, 2008 AT 6:53 PM

1 Reply

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
If it only happen when the engine is cold, it's probably the ECT(engine coolant temp sensor).
Can also be IAC, MAF Or TPS, try unplugging the MAF befor you start the car, if it smoothes out, replace the MAF.
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Wednesday, September 10th, 2008 AT 3:04 PM

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