2000 Pontiac Grand Prix dramatic gas mileage drop

2000 PONTIAC GRAND PRIX
141,000 MILES • 6 CYL • FWD • AUTOMATIC
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IDRATHERBEDRIVINGAVW
  • MEMBER
  • 1 POST
hey ive got a 2000 Grand Prix and after i replaced the brakes and a rear-wheel bearing right after Christmas i noticed that my gas mileage dropped for the normal 27 mpg to around 14 mpg.... ive checked the air filter and im wondering if the spark plugs and cables may be responsible.... if its not those... any input on how to fixx it would be very handy
Apr 9, 2008 at 2:24 PM
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BLACKOP555
  • ✓Experienced Mechanic
  • 10,386 POSTS
this happened right after the maintence on brakes and wheel bearings not a few weeks later?
Apr 9, 2008 at 2:57 PM
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