GXP misfiring
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GXP misfiring
Hey y'all. This morning when I was leaving for work I noticed, at idle, a considerable misfire in the GXP. After a 50 mile drive to work the car was idling fine. I plan to take it to the shop this evening but first wanted to see if anyone here might have some ideas as to what it could be.
#2
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Since my car was new, it doesnt like to run well when cold. even when it'* warmer outside it can sputter when I get on it cold. I also have to get on it to "clear it out after I let it sit at an idle for periods of like a half hour whibh is unavoidable when I have my Aunt with me like when I shop and it'* cold outside. Also,... are you running regular fuel. The Northstar really wants better octane with higher than normal compression and this would be more apparent in cold weather.
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Also,... are you running regular fuel. The Northstar really wants better octane with higher than normal compression and this would be more apparent in cold weather.
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I have used nothing but 93 Octance in the car since I bought it new. Actually, I have never used any less in any of my cars.
However, I found out this morning that the fuel station I always use had a problem with one of their storage tanks and will be closed for a few days. Could be something to do with it.
I filled it this morning at a different station and by the time I got to work it was back to its normal self.
Hopefully this works.
Thks.
However, I found out this morning that the fuel station I always use had a problem with one of their storage tanks and will be closed for a few days. Could be something to do with it.
I filled it this morning at a different station and by the time I got to work it was back to its normal self.
Hopefully this works.
Thks.
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the fuel station I always use had a problem with one of their storage tanks
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I jsut went outside and let the car idle for about five minutes and it ran very normal without misfiring.
The fuel station I normally use is very old. I filled up this morning at a very new chevron station. Like you said, could have been anything in the gas...
The fuel station I normally use is very old. I filled up this morning at a very new chevron station. Like you said, could have been anything in the gas...
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My 18k mile 05 GXP does, for lack of a better word, occasionally “shake” a little for 5 - 10 seconds or so when I first start it up. Nothing major, but you can feel that the engine is not quite running smoothly. I don’t think I’ve noticed it happening on a cold start first thing in the am, but maybe if the car has been sitting for an hour or 2.
I run nothing but 93 octane. If anything, I believe higher octane fuel would contribute to the problem on a cold or cool start since it burns more slowly and is slightly harder to ignite than the low octane stuff.
I run nothing but 93 octane. If anything, I believe higher octane fuel would contribute to the problem on a cold or cool start since it burns more slowly and is slightly harder to ignite than the low octane stuff.
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Finally figured out the problem with the misfire. Turns out that the coil for #5 cylinder was starting to fail and subsequently caused a misfire at low rpm. It took the dealer nearly 5 days to figure this out. Got the car back last night and I am happy to say that the car is back to normal.
Well at least I got new plugs and new injectors for free.
Well at least I got new plugs and new injectors for free.
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