2002 grand prix rpm goes up and down when ruuning idle and car uses twice as nuch gas replaced tps problem still exists

Asked by Mar 28, 2016 at 09:55 PM about the 2002 Pontiac Grand Prix GT

Question type: Maintenance & Repair

1 Answer

12,750

sounds like you might have a vacuum leak, could cause the idle problem. also an idle air control valve could do it. a vac leak could also cause more fuel consumption. also when was your last tune up? your last air filter?, fuel filter? Scan the computer for codes also. with the engine running like that there should be a code stored.

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