I too just I just installed LT headers, HF cats (Y), O2 sensors. I had the 420/430 codes before doing so.
After installing the cam 25-30k miles ago, my tuner had a helluva time getting g it to...
Type: Posts; User: tdwightusa
I too just I just installed LT headers, HF cats (Y), O2 sensors. I had the 420/430 codes before doing so.
After installing the cam 25-30k miles ago, my tuner had a helluva time getting g it to...
If you saved a tune that does not have the permanent designation, reflash with that tune. Don?t reread the tune that has permanent.
Replace your PCV valve if you notice idle surge/rough or almost...