I have a 98 grand prix gtp and it runs bad until it gets warmed up and then runs great?

Asked by austinr417 Aug 19, 2012 at 09:02 AM about the 1998 Pontiac Grand Prix 2 Dr GTP Supercharged Coupe

Question type: Maintenance & Repair

i can't figure out why my 98 grand prix gtp runs like crap when i first start and after it warms up and sometimes shut it off and turn it back on it will run perfect.. any body got any ideas? I can't figure it out. thanks for all the help..

1 Answer
135

Ruth answered 11 years ago

Bad Gas.....They for funny about what kind of gas you put in them......STP treatment for gas.......Mid-grade of prim..gas

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