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

2001 MERCURY COUGAR
62,000 MILES
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DAN B.
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  • 2 POSTS
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
Feb 17, 2012 at 9:27 PM
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WRENCHTECH
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Is the check engine light coming on at all?
Feb 17, 2012 at 9:34 PM
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DAN B.
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Has flashed while driving. No steady lite. Flashed only
Feb 17, 2012 at 10:09 PM
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WRENCHTECH
  • ✓ASE Certified Mechanic
  • 20,761 POSTS
  • ASE Certified Mechanic
You need to have the codes read to get a starting point. Post the code number/s here.
Feb 17, 2012 at 10:31 PM
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