|
Re: 89 350
I start the truck, it runs for 3-5 seconds. It appears to shut off the fuel.
Pulled codes only code was a 45 (too rich)
We started it and squirted fuel into the TBI it ran for about 10 seconds then I think it was too much fuel and stalled.
Things we tried...
Fuel pump relay, fuse is good and does run the pump when key is turned on
Oil Pressure fuel pump cut out (found out from another truck we have that they will run with that disconnected)
O2 sensor... thought it was reading too rich and was shutting off fuel ( also found from other truck that they will run without it hooked up)
TBI tried that figured that eliminated TPS, Idle bypass, injectors, reg all at once.. didn't help.
Distributor (thought it wasn't giving a ref signal and computer didn't know engine was running, no help)
Computer from identical truck... didn't help...
tried 12v straight to the pump it still shut down at the injectors. Like it was being told not to inject fuel.
Going to hook up fuel pressure gauge today to see if it is loosing pressure while it is dies
Tank sender unit, fuel pump, fuel lines filter have all been replaced about 18 months ago (8000 miles)
Only thing left in the fuel circuit that we didn't change is the coolant sensor...
|