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View Full Version : sr backfires, shakes cus it backfires, misfires, popcorn at idle


Fender Defender
01-23-2011, 05:34 PM
Help!!! My sr20det is having problems, tried fixing it for a while but don't even know where to start anymore.

when i first got it it never did that until I drove it down to a lower altitude then it started misfiring and whatnot.
changed the fuel filter, sparkplugs, the weird thing is when I used bkr7e xi it did it less, then when I started using the 6's it started doing it more.

at idle it backfires, and misfires, it sounds like im popping popcorn. I was thinking maybe I was running too rich or something. Idle is fine, no smoking or anything, runs fine. When i rev and release the gas pedal it starts making popping noises as it goes down

I'll add a video soon.

Pure_JDM
01-23-2011, 05:35 PM
Holy shit, a popcorn making SR? I'm jealous.

Fender Defender
01-23-2011, 06:09 PM
seriously, at this point I'd wish popcorn came outta the exhaust lol

Om1kron
01-23-2011, 11:09 PM
maf, knocksensor, and cas can be the culprit, but I'll bet it's the knock sensor.

You can take off the maf and clean it off if there is dirt on the little diodes just don't break them.