Been working on this for a little while and need a second pair of eyes look at it
the problem is the fuel pump will not trigger via ecm controls
Engine is a 6.0 ly6 with vvt delete (by way of camshaft)
Computer setup is a E38 with a t42
Harness is stand alone built by me (first gen4 harness but have built several gen 3 harnesses )
Tune is set up for a fixed rate pump with no fpcm equipped selected
have disabled starter checks and enabled vats1 and vats2 patches but still no pump
the ecm is wired to have the constant battery voltage on the red wire and has a relay from ignition switching all pink wires on
the fuel pump relay is wired to switch power with a voltage side of the relay switched from the ecm (according to gm service information and a few people on this forum 12volts comes from the ecm still seams odd but if thats how its done.)
vcm controls will toggle primary pump status in the scanner to on and off but will not switch fuel pump on.
fuel pump relay control is coming from pin 50 on x1 of the ecm and if power is connected the pump triggers on.
if pump is jumped to power the truck will fire for a few seconds then shut off
fuel cut type says none
also work mentioning the throttle is not hooked up and am getting p2122 and p2127 and the tcm i am using is from a car and dosent match the 4l80e i have hooked on it will be taking care of these issues tonight, hopefully that is my fix
im attaching my tune file if someone will look over it and see if i missed something it would be greatly appreciated