Quote:
Originally Posted by vubaru
OK, I haven't checked my injectors yet but I am getting some backfiring/popping between aggressive shifts occasionally on my BRZ w/ AVO Stage 1 turbo kit. During my major cam issues and an idle stall/shudder event, I did throw a P0300 misfire, but it hasn't done it again since the cam repairs and I have not thrown a single code since then.
Is the slight popping/backfiring between shifts normal with a high-flow cat and engine back exhaust, or should I start worrying about replacing injectors etc?
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When you are turbo and have a vented to atmosphere BOV and it is post MAF sensor like the AVO kit, you will be RICH on shifts (lift gas pedal BOV dumps metered air to atmosphere gas is left in the cylinder to be burned), and thus the unburned fuel will backfire and pop in the exhaust. That has nothing to do with this issue.