All stock. I just scanned again and I have P0303 and P0420. I have BAFX and dash command. CMP ret is at 3*. I know it’s slightly out of spec.
Things I’ve done within the past 3 months
-New plugs NGK TR55 (old ones were all clean including my cylinder 3)
-New AC Delco wires
-New AC Delco...
98 K1500. Stock original motor. Have had truck for 15 years. Had this problem for a couple years now but just recently started digging into this to fix it.
So here we go- Truck runs smooth everywhere EXCEPT going up hill(cresting a hill), going to pass on the freeway, merging, anything above...
This does not read CMP offset. I have this exact model and it reads Ignition Advance for Cylinder 1. Not saying you are wrong, but this model for me definitely does not read CMP offset.