1999 Ford Expedition vibrations

Tiny
DUTE15
  • MEMBER
  • 1999 FORD EXPEDITION
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 171,000 MILES
My expedition vibrates sometime real bad when I press on the gas. When it vibrates and I press on the gas harder it goes away or if I let up on the gas it goes away. Its only when I get it up to say 35 mph will it happen-thanks
Monday, March 23rd, 2009 AT 4:09 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Has the check engine light ever come on?
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Thursday, April 9th, 2009 AT 9:48 AM
Tiny
DUTE15
  • MEMBER
  • 2 POSTS
Yes it has but doesnt stay on
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Thursday, April 9th, 2009 AT 10:13 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi:
If the light was on, there will be a code in the computer. Most nationally recognized parts stores will scan it for free, so there is no money out of pocket. I recommend taking it to one and having them scan it. Chances are it will identify a random misfire, but it may be specific to one cylender. Then we will know what to check.

Let me know what you find.

Joe
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Thursday, April 9th, 2009 AT 8:33 PM

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