Beeffajitas
OBS Enthusiast
So this seems odd to me. I did the 411 swap several months ago. Ran fine out of the gate. I had it dyno tuned over the summer. The truck has been sitting for a few months due to a rear axle swap. Once I got it running again, it throws the Crank Relearn Code. I have HPTuners now, so I did the relearn, twice now. Now it's throwing P0300 and P0304 codes. The other day it was actually flashing the SES, which I assume means it thinks it's a really bad misfire. The engine seems to be running fine when warm. It does stumble when it's cold and I know I need to address the cold engine tune, but it doesn't throw the code then.
I'll double check cylinder 4 spark plug, etc. But, has anyone had this issue with the 411 swap. It just seems really random to me.
I'll double check cylinder 4 spark plug, etc. But, has anyone had this issue with the 411 swap. It just seems really random to me.