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What is a common vacuum problem on the 2001 Cougar CS?

Tiny
DAN B.
  • MEMBER
  • 2001 MERCURY COUGAR
  • 62,000 MILES
I have a 2001 Mercury Cougar CS, 2.5 V6 (Dual Overhead Cam), automatic transmission.
The vehicle bucks while in drive and stopped. Then when you gradually accelerate to 39 MPH it keeps bucking. After 40 MPH it stops. The problem is more present after the vehicle is warmed up. When from start up it is not as much. When idling, it is very minimal. I was told this a vacuum problem. I've looked over the system very good and cannot find anything wrong. So where does a problem like this stem from?

Thank you for any help you can give me,

Dan
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Friday, February 17th, 2012 AT 9:27 PM

3 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Is the check engine light coming on at all?
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Friday, February 17th, 2012 AT 9:34 PM
Tiny
DAN B.
  • MEMBER
  • 2 POSTS
Has flashed while driving. No steady lite. Flashed only
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Friday, February 17th, 2012 AT 10:09 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You need to have the codes read to get a starting point. Post the code number/s here.
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Friday, February 17th, 2012 AT 10:31 PM

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