1999 Buick Century Engine bucks while driving

1999 BUICK CENTURY

19,200 MILES • 6 CYL • FWD • AUTOMATIC

SHEILA RODGERS

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2 POSTS
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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!

Oct 17, 2008 at 12:50 PM

JACOBANDNICKOLAS

CERTIFIED EXPERT
110,175 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

Oct 17, 2008 at 3:02 PM