Ole Bessie
Newbie
Have an issue that has me stumped. 91 TBI 350 with 240k miles. Truck starts up, runs, and drives great. No rough idle, no bogging off the line, but once I am moving and hit the gas to accelerate and pass someone or speed up the engine will bog down and backfire. If I let off the gas then slowly get back into it it will be fine. It started doing this a couple months ago and because of that I had to leave the truck in Maryland at my moms while I moved out to Utah. I had the truck shipped to me and have had it back for almost 2 weeks and it I'm still having the issues.
Replaced spring last year:
Distributor cap/rotor
Coil
Plugs
Wires
Air filter
I have a fuel filter but haven't put it in yet since it will start up and run just fine (most of the time)
I haven't tried to jump the OBD1 port to see if any lights flash on the dash, but I can't figure out what the issue is. I feel like it might be the throttle position sensor is losing voltage once everything gets nice and warm, but I'm not positive and don't want to throw parts at it. I have thought about just getting a reman L05 from Autozone with a new TBI unit and such just so it's got a fresh motor.
Any ideas what it might be?
Replaced spring last year:
Distributor cap/rotor
Coil
Plugs
Wires
Air filter
I have a fuel filter but haven't put it in yet since it will start up and run just fine (most of the time)
I haven't tried to jump the OBD1 port to see if any lights flash on the dash, but I can't figure out what the issue is. I feel like it might be the throttle position sensor is losing voltage once everything gets nice and warm, but I'm not positive and don't want to throw parts at it. I have thought about just getting a reman L05 from Autozone with a new TBI unit and such just so it's got a fresh motor.
Any ideas what it might be?