I have an '86 F250/460/4 speed/4x4/flatbed. I recently had to replace the fuel tank selector valve on the frame rail. The new switch assy works just fine. The problem I'm having now is that when driving the truck, after a few miles down the road (between 3-5) the truck starts acting like it's running out of gas. It's mostly when pulling a hill or mashing on it. The enging doesn't have an EGR valve, nor does it have a catallidic converter. All of the fuel filters have been replaced, as well as the lines. I'm stumped. Any ideas??
I was crawling around under the truck yesteday and found a connector plug that is connected to the harness that runs to the fuel tank switch valve solenoid on the frame rail. The plug only has 2 wires, one is looped back into the plug itslef, the other wasn't plugged into anything (just kinda hanging out) but the plug did have a hole where a wire appeared to have been pulled out. Could this plug be the source of my woes?? I unplugged the connecter (removed) and the ignition switch wouldn't engage the starter. Is it possible that there is something else the plug controls and the missing/unplugged wire is the reason?
If anyone knows...PLEASE let me know. This one is kicking me in the ****!!