Having some issues with my '03 R/T CC.
Stumbling/rough idle.
No CEL.
Stumbles/hesitates on acceleration from idle.
Data log shows 02 sensor voltage all over the place, air fuel and timing also jumping around trying to keep up.
Battery voltage seems fine.
Driving is fine, after it comes off idle, no indications of running rough.
Power/accel (once of the initial idling stumble) seems fine.
Thinking it could be an 02 sensor? Truck has 114K and I assume they are all stock. Replace all 4?
Or could be the IAC? Cleaned it really good 5 months ago with the M1 instal, has been running great since then..
I've read the upstream 02's feed the air/fuel mix to the PCM, could one or both be bad?
Any brand of 02 sensors to stay away from?
Thanks in advance for the advice!