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My car is running rough at idle

Car is running rough at idle

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@nick21367 there are just to many possibilities to discuss them all on here. We'd be taking a long time to fix your Cobalt. Go ahead and have the OBDII scanned and tell us what scan codes came up. That will narrow it down by quite a bit. It could be a fuel issue as well as an air issue and many things in between

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What’s your mileage? 160,000 is the spark plug interval-Check spark plug condition and gap- should be no more that

.060”.

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