My 1986 Bronco quit running a couple of weeks ago and had to be towed home. It didn't have any fuel pressure, so since I already needed to drop the fuel tank to replace the rubber hose from the filler neck to the tank, I replaced the 'in tank' pump at the same time. This did not fix the problem, so I replaced the external pump for good measure (old pump had 250,000 miles on it), I also replaced the inertia switch with a known good one. After unwrapping the wiring harness and replacing any suspect wires (had no broken wires, just some with bad insulation) I got the truck to start. I connected my code scanner and got no codes for the KOEO test and got a 31 EGR code (old code) on the KOER test, so I rewrapped the wiring harness and went for a test drive. Now the truck seems run ok at a low load level, but when you step harder on the gas it doesn't want to take it and starts to sputter. It also seems to get hot fast, almost the timing is way off, but I have checked the base timing(with spout diconnected) and it is 8 degrees. At the suggestion of a friend I also put in a new fuel pressure regulator (Kirban aftermarket unit). The engine is a crate 5.0 efi with less than 8,000 miles and had been running flawlessly until this incident. I just can't figure this one out.
Thanks for any Help.......Tom