I suspect the fuel regulator.

Tiny
DYNAMATECH
  • 2000 FORD EXPEDITION
  • 158,000 MILES

Hello and thank you for this wonderful service. I have a 2000 ford expedition 5.4L. Every time I make a sharp turn, u turn, go over hard terrain and hills, my engine bogs down for a quick second, and then continues. And sometimes, I could feel a loss of power. They replaced the fuel pump 2x's under warranty and still the same problem. Could it be the fuel regulator? Thanks. Jose

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Sunday, September 23rd, 2012 AT 5:35 AM

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Tiny
KHLOW2008
  • EXPERT
  • 41,975 POSTS

Are there any trouble codes?
What is the idling speed at operating temperature?

Symptoms indicates it is more likely to be linked to the throttle controls and Mass Air Flow.

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Sunday, September 23rd, 2012 AT 7:56 AM

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