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03-15-2011
i have a 1998 grand prix supercharged the service engine light is flashing and the car is puttering. i know i need a tune and was on my way when this issue happened i pulled the car over waited 10 minutes then proceded home. i was hoping that anyone can give me some advise so i dont look like a dummy going into the shop
03-15-2011
Moved to the correct section.
You'll get more helpful responses if you post in the correct section.
Flashing SES light might be a P0300, multiple misfires and puttering sounds like it entered limp mode.
Without knowing anything else, can't say more.
03-15-2011
Flashing SES means the computer sees a "catalyst damaging condition", aka typically a bad misfire. Which you mentioned in your description. Typically a fresh set of spark plugs and plug wires clear this right up. There are other things that can cause it, you kinda mentioned you needed those though. Start there and see if that solves the problem.
03-16-2011
Well i had diagnostic done and i have a MISFIRE yes i do! i will be getting a tune up today and its very exspensive. i also had a PO442 code pop up thanks guys
03-16-2011
Expensive?
Plugs shouldn't be more than $60 (marked up iridiums) and wires ~$30. One hour of labor.
We could have helped walk you through doing it yourself. A tune up on these cars are quite easy.
03-16-2011
Autolite plugs are $1.99 a piece.
Lifetime warrantied spark plug wires are $30 at Autozone...
soooo...$50 and a couple hours of your time...
03-16-2011
And if those don't take care of it, look into your ignition coils. Cheap fix too, especially from the junkyard. Good luck!
03-16-2011
Injectors are a possibility. My car threw the same code and I had a bad injector.
03-17-2011
now u guys tell me! i paid 69 for all the parts at NAPA. how do you know if you need a core pack replaced?
03-17-2011
Replace the parts you have..and then if it still misfires we'll walk you through that. Likely you need the tune up and the parts/cost won't be wasted.
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