Thread: Whats better?

Open cone.

Okay well i unplugged the battery for fifteen minutes so the pcm can re learn fuel trims for the open cone. I tried the open cone before but did not unplug the battery, so the car seemed to run a little rough. What i mean by rough is when i let off the gas at 40ish or above the rpms seem to bounce around slightly and i can hear the exhaust a little more.. it sounds like when u put it into 2nd while goin like.. 30 and it revs up but your not hitting the gas.Well this time it runs basically the same i drove it quite a bit too.. so idk why it does that. It does not do this when the cone is attatched to the pvc