Wat does it mean when my car is overheating and making this rattling noise and worst when I hit the gas....

Asked by Oct 28, 2013 at 09:09 AM about the 2002 Pontiac Grand Prix

Question type: Maintenance & Repair

3 Answers


Severe engine damage will result if you continue to operate that way.


Your car has a feature that will try to prevent engine damage when the computer senses an overheating condition. The computer will begin firing alternate cylinders and use the non firing cylinders to aid in cooling. Kind of like an air cooled engine. When this happens the engine will run poorly but is designed to get you off the road. The overheating condition needs to be addressed. This feature is not designed to be used all the time! HTH. -Jim


A plugged catalytic converter springs to mind although it could be a number of other things too.

Your Answer

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 1,917 nationwide Grand Prix listings starting at $3,000.


Pontiac Grand Prix Experts

  • #1
  • #2
    Tom Demyan
  • #3
View All

Related Models For Sale

Used Chevrolet Impala
362 Great Deals out of 27,067 listings starting at $1,000
Used Pontiac Bonneville
336 listings starting at $995
Used Chevrolet Monte Carlo
970 listings starting at $3,786
Used Chevrolet Malibu
593 Great Deals out of 48,267 listings starting at $1,800
Used Pontiac Grand Am
764 listings
Used Ford Mustang
289 Great Deals out of 38,395 listings starting at $1,995
Used Chevrolet Camaro
248 Great Deals out of 29,861 listings starting at $4,980
Used Pontiac Firebird
6 Great Deals out of 670 listings starting at $2,500
Used Nissan Maxima
239 Great Deals out of 17,867 listings starting at $1,995
Used Jeep Grand Cherokee
791 Great Deals out of 73,453 listings starting at $500

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
285 listings starting at $3,995
2007 Pontiac Grand Prix For Sale
269 listings starting at $3,800
2006 Pontiac Grand Prix For Sale
336 listings starting at $4,000
2005 Pontiac Grand Prix For Sale
249 listings starting at $3,000

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.