Intermittent Misfires p0301-p0304 at warm idle
2004 Turbo WRX, axle back exhaust.
The car runs fairly well driving around. But, I keep encountering intermittent misfire CELs when idling. I am not getting any other codes. Sometimes, I’ll just get one code; other times I’ll get two to three cylinder codes.
I’ve done tons of web research and most other people have constant misfires. Again, I only get occasional misfires when the engine is warm, at idle, and in closed loop.
One of my freeze frames:
Intake air temp: 123 degrees f
Air flow rate .52lb/min
Throttle position: 12%
Load value: 1.9%
Coolant Temp: 179 deg f
MAP: -15 in. HG
Veh Speed: 0 mph
Ignition timing: 12.5 deg
Help….. any ideas or other links would be very, very much appreciated.
Thanks in advance