Hey gang, I'm stumped aand figgered this may be the place to ask.
'89 GMC Sierra 2500 / 5.7L / Auto / 4x4 / 3/4 Ton Heavy
Replaced the Fuel Pump Relay, Fuel Pump, Pickup Screen, and Fuel Filter.
The engine starts if you pour gas down the throttle body, but won't fire otherwise. The pump is pumping fuel, as I have checked this.
I had it running on it's own for about 5 minutes, then it died, I then ensued and replaced the above parts.
My hunch is it may be the Fuel Pressure Regulator, Injectors, or the ECM. I have no idea how to check these, or which to look at first.
What's your'e guy's hunch on this senerio?
Thanks..................SM