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Installed a new fuel filter last night. Interestingly, the low rpm idle improved immediately, I can start the car without using the gas pedal and it idles without dying. I thought I had the problem solved until I took the car out and it still is running rough and without power at rpms above 3K. I still have less than 1/2 a tank of gas treated with techron. Could the techron be affecting the performance?
when I take the car to redline, it feels like it is misfiring , but not stalling or backfiring. As always, your help is appreciated
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