Hello,
I have a 2000 5.3 swapped into a 1971 C10 with an SM465 manual trans. Engine is stock except for a CAI and shorty headers. My neighbor and i got it running on our own.
I have been struggling with a stumbling under load issue. It will throw a P0507(idle higher than expected) and multiple misfire code. I have been chasing fuel, sensors, etc but i guess i just don't know enough to figure out what is going on. It ran great for 2 days in the midst of my troubleshooting but has since returned to it's troubled ways.
Attached is my tune and a log of me hitting it at WOT. We noticed that the STFT and LTFT both go to 0.0 at WOT. Is this normal? Does anyone see anything else that i should be aware of?
I really appreciate any help.