gretchenthe454
Newbie
Hi everyone! This is my first post here. A couple months ago, I bought a 1992 sierra 2500. It has the 454 with the nv4500 trans. PO had both rebuilt within the last 10,000ish miles. Since taking ownership, I've done small fixes here and there that's to be expected on a 30+ year old truck.
So here's what's been going on... a couple days ago, I noticed that the truck hesitates and acts like it's going to stall when starting out in each gear (and it has stalled on me while driving and in motion.)
The truck will start just fine when cold but when warmed up, I have to put the go pedal to the floor while turning the key to get it to start.
And lastly, when coasting, not in gear, the truck sits at 2k rpm.
I just replaced the fuel pump assembly with no changes in performance. Anyone have a clue as to what the problem could be? The fuel pressure regulator is what I'm thinking now but would like some thoughts before I go tearing into the engine. I'm somewhat mechanically inclined but unfamiliar with these engines as this is my first obs (if there's a few YouTube videos on the subject, I'm confident I can get it done)
Thanks in advance to anyone with some pointers. Happy to be a part of the forum!
So here's what's been going on... a couple days ago, I noticed that the truck hesitates and acts like it's going to stall when starting out in each gear (and it has stalled on me while driving and in motion.)
The truck will start just fine when cold but when warmed up, I have to put the go pedal to the floor while turning the key to get it to start.
And lastly, when coasting, not in gear, the truck sits at 2k rpm.
I just replaced the fuel pump assembly with no changes in performance. Anyone have a clue as to what the problem could be? The fuel pressure regulator is what I'm thinking now but would like some thoughts before I go tearing into the engine. I'm somewhat mechanically inclined but unfamiliar with these engines as this is my first obs (if there's a few YouTube videos on the subject, I'm confident I can get it done)
Thanks in advance to anyone with some pointers. Happy to be a part of the forum!