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Car only backfires when accelerating at any rpm

422 Views 5 Replies 4 Participants Last post by  xqwerty
Just installed Megan racing headers on my tc1, first couple of days were fine and out of nowhere check engine light starts flashing and car was only backfiring when getting on the gas. I have an 02 sensor "bypass" but idk if it's faulty. NEED HELP ASAP
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You will feel some difference with headers but not much. Best bang is cat back and cold air intake. Also changing out the pulleys will help. A stiff rear sway bar will also make it more fun to drive, not faster though.
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