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When driving over 70 MPH the engine runs rough and the car shakes

Tiny
CHEVY__88
  • MEMBER
  • 2001 LINCOLN TOWN CAR
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 148,235 MILES
Car feels really rough, body of the car shakes. Only when I go over 70mph. I have had air ride suspension and alignment done a couple years ago.
Friday, April 30th, 2021 AT 9:02 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

The first things I recommend checking are the tires and tire balance. Have you done that? Check to see if there is anything that may indicate a belt shifted or damaged in the tire. If the tires are good, then try having the balance checked.

Let me know what you find.

Joe
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Saturday, May 1st, 2021 AT 9:16 PM
Tiny
CHEVY__88
  • MEMBER
  • 95 POSTS
I will try. The tires are about a year and a half old. It has been sitting the last 6 months or so because I was driving a company truck. Had some misfire issues before that and have replaced all coils and plugs.
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Saturday, May 1st, 2021 AT 10:12 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Check them and let me know what you find.

Take care,

Joe
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Saturday, May 1st, 2021 AT 11:21 PM

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