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08-26-2011
Alright, my 99 gt is hurtin a bit. I entered the interstate and it was hoppin, engine light flashed and then went solid. I checked everything and it was running good. Got home and scanned it. Cylinder 5 misfired. I changed the spark wires and the coil pack for 5 and 2, cleared the codes, and now it is running worse. Did I maybe crack the spark plugs or would it be the new coil pack and the two old ones combined that make it run bad?
08-26-2011
pull the plug and see what it looks like.
08-26-2011
Could it possibly be the mismatched coil packs to then?
08-26-2011
having a new coil pack and 2 old ones wont do any harm, as long they all work, they do the same thing.
id pull the plugs and see what they look like and might aswell change them.
08-26-2011
alright, I just changed them about 500 miles or so ago but one of the plugs went on hard. And I got silicone for the wires and used that like the directions said but I have never heard of any silicone for those. It is supposed to help the wire from sticking onto the plug itself. Would that do some harm then to? And I am checking the plugs tomorow for sure to.
08-26-2011
the silcone is more a protector grease for the plug and wire to stop misfire's and corrosion build up. Its fine to have it on there.
08-26-2011
Alright thanks, then its just plugs, if it doesnt work by changing some of them then I dont know whats up with it. Thanks for the help.
08-27-2011
well let us know what you find in those plugs.
08-28-2011
misfire could be a faulty injector too. how many miles do you have on there and have the injectors been replaced before?
08-30-2011
I figured it out, the wires loosened up and one fell off, now it runs like a dream again, and it had just got to 150,000 when this happened.
08-31-2011
Nice
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