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Issues with sputtering or misfires, goes away when car has been running for a while


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So I have some issues where i'm getting dips in power, like if the car is misfiring, and uneven acceleration that goes away once the car is warmed up. It is especially apparent at low RPM. The other day even I got in the car and turned on AC and it wouldn't get to idle RPM and stalled, did this twice, and then it ran properly. I thought the first part might be coils, i bought replacements and didn't put them in yet, until that idle mishap happened. 

Any ideas? 

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