Mister1500
Newbie
Okay guys I need new help. Just received a new to me 1999 C1500 GMC Suburban. Has been sitting approx 2 years. It cranks an fires, runs momentarily 2-5 seconds then dies. I have 60 psi key on engine off. After it starts it drops to roughly 54-56 psi. Never drops below that. It wont take any throttle. If I spray a fuel source into the throttle plate it stays running until I stop spraying. Seems like maybe a SFI issue. Currently no codes. Not sure where to go from here. Never had a central SFI system before. Any suggestions? Is there a separate crank vs running signal to the SFI? Thanks for everyone’s time.