MHisey

Hi all I’m new here and was wondering if I could get some help on figuring out my trucks issue I’m pretty sure it’s the ecm. The truck cranks but doesn’t fire and there’s no lights on the dash all fuses are good I replaced the fuel pump thinking it was that but recently found out that the fuel pump isn’t grounding properly and I read online that the fuel pump grounds through the ecm. I’ve also checked my pcm but putting in my buddies truck it worked fine. Is there any way to be sure it’s my ecm?

bill50cal

no lift pump and no wait to start light are both signs of a bad ecm also check if the fuel pump relay in the under hood fuse box is energizing, this one turns on the injection pump and is also controlled by the ecm

SIXSLUG

What year? Can you pull any codes? Could save a lot of time and money over throwing parts at it....
Maybe as simple as a bad ground.