so ive been noticing that my h22 civic has been misfiring/backfiring alot during deceleration. welp i finally got around to hooking up my plx wb02.

while the car backfires/misfires the gauge will jump around 17:a afr instead of pegging 20:1 like it usually does. it doesnt always do this though, sometimes when its warming up or when its at operating temp, just randomly.

so my question is is it possible that while its decelerating a injector could be leaking into one of the cylinders? or somehow could the tps be picking a signal somehow?

im just confused by it, and im looking for ideas of what could be happening.

also this is on the stock p13 jdm h22a ecu. its throwing 2 cels which consist of o2 sensor heater( anyone that has hooked up the plx wb02 knows that it will throw this code but the heater is still actually working), and also a code for egr but that has been blocked off and is not causing any problems.


thanks for any help