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1999 Buick Century Engine bucks while driving

Tiny
SHEILA RODGERS
  • MEMBER
  • 1999 BUICK CENTURY
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 19,200 MILES
I have a 99 Buick Centruy that has some strange problems. It seems to buck while I am driving. I have replaced the top o2 sensor, to no avail. It has dropped gas mileage from 32 city to 20 city. Can you help? I am desperate!
Friday, October 17th, 2008 AT 12:50 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi:

Have you had the computer scanned for codes? That would be my first step. To me it sounds like a map sensor of a mass air flow sensor, but don't replace them until you know for sure.

Most nationally recognized parts stores will scan it for free.

Let me know what you find.
Joe
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Friday, October 17th, 2008 AT 3:02 PM

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