Bad Gas Mileage

2002 PONTIAC GRAND PRIX
180 MILES • 6 CYL • FWD • AUTOMATIC
Avatar
CMGOLD
  • MEMBER
  • 1 POST
I have a question regarding our `02 Grand Prix. Normally we get around 25-34mpg or 400-425 miles on a tank of gas and recently we have gotten REALLY bad gas mileage. Couple of things have changed, we live in WI, so it is cold, which means sometimes we let the car run for awhile before we drive it to warm it up. This last tank I had about 80 miles of highway driving but the rest was in town and idling. Anyhow, this tank will only get about 250 miles on the tank. We have never gotten that bad of gas mileage in the last 60k miles we`ve had it. Also, there is a little smell that I have started noticing...not a gasoline smell, almost like a propane or other `gas` smell. Any ideas??
Feb 5, 2011 at 1:36 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Cold weather has an affect on mileage, but not that much. If you smell a bad odor, check to make sure the catalytic converter isn't plugging. Also, check for tune up and if the check engine light is on, have it scanned for codes. Most parts stores will do it for free.
Mar 1, 2011 at 5:40 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.