I swapped a 2000 5.3l into a 1969 C10, I'm new to tuning and swapping. So I wrote entire with the vats on "none", the fuel pump primed and everything like it should and it started and ran like it should. I killed it and tried to start it again and the fuel pump is not getting signal from the Ecm. Then I read that you may have to set a few dtc's to "no error reported" so I did and as I tried to rewrite the ecm it says write transfer timed out? Any thoughts?