Any experience with 380hp mpfi conversion kit?

jammied said
OK I have made a few engine harnesses from ram trucks with obd2 ecm's and haven't had any problems. They start,run and shift as they should in older vehicles.

Now I also have 2 of the mopar performance p5153734ab ecm's for the 380hp crate engine mpfi conversion kit. But can't get them to run on the harnesses I made.

I must be missing something in the instruction sheet and wiring diagram sheet from mopar performance as they will fire the engine right up but then they die in a few seconds.

Anyone play with the 380hp crate mpfi kit before?

Thanks for any help this is driving me crazy

I know it’s probably a stupid question but how is your fuel pump wired, to pdc or ignition? Does it sputter when it dies or just kills? Could try and rule out fuel by bypassing ecu? But the first commentator was probably right on with approach. Let us know what it is when you figure it out!