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12-27-2009
I was driving my 1999 pontiac grand prix gt 3.8 liter on a 40 mile trip right when i exited the highway my car stalled i restarted it ran very rough i had it towed home i am getting a code of po300 random/ multiple cylinder misfire i checked coilpacks & ecm also changed plugs still runs very rough will not idle have to keep the gas pedal feathered what could it be my car ran perfect before this happened
12-27-2009
Welcome to the forums, although i would recommend reading the stickies and making yourself familier with all the sections, this is for intros only and you won't get much traffic to help you with your tech issues. Post your problems up in the General Tech threads, thanks!
12-29-2009
welcome. reads the stickies! change plugs and wires and fuel filter. make sure terminal tip of coil aren't corroded. no autozone wires! use ac delco or high name brand.
12-29-2009
Might also have a clogged cat?
12-29-2009
also crappy fuel, hey, its possible!
12-29-2009
Here in Oklahoma its 7/11 fuel.. never had any luck with it.Originally Posted by badbrad
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