2002 Pontiac Grand Prix Just wont run right

STEVEIP57

MEMBER
2002 PONTIAC GRAND PRIX
6 CYL
2WD
AUTOMATIC
55,000 MILES

So the other day I ran my car really low on gass and let it sit for 3 days. Not knowing that it was -40degrees celcius and I fillled my car up with gas and it seems like it is starving for fuel. I used one of those reader things and it is saying that it is missfiring, I have tried gas line antifreeze and fuel injector cleaner but it is still not fixed, any tips?

2 Replies

MASTERTECHTIM

MECHANIC
4,750 POSTS

Its time for a tune up. Replace spark plugs and wires. Look closely at the coil, where the plug wire connects to it, some might be burnt with carbon. Use wire brush to clean them and replace plugs and wires. Ill bet this fixes your problem. Feedback and votes for me are greatly appreciated.

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Sunday, January 20th, 2008 AT 1:34 PM

MASTERTECHTIM

MECHANIC
4,750 POSTS

If you did tune up and its not a ignition problem then you need to do an injector balance test on the injectors. Unfortunately you need special tools to do it. Double check under intake manifold that there are no signs of a mouse nest. They can eat the injector wire harness. Its pretty obvious, they usually eat the under hood insulation and build the nest. Check back with us.

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Monday, January 21st, 2008 AT 8:05 AM