I have a 1991 Ford F-150 Supercab, 5.8 EFI V8, E40D Auto Trans, dual tanks, 129,000 miles. I posted a question before, but I am still having problems with my truck. I have replaced the rear fuel pump, totally bypassed the front tank, lines and all, replaced the fuel pressure regulator, fuel pump relay, another relay in same area as fuel pump relay, changed the transmission filter and fluid, and even had codes pulled, of which at first it pulled 12 codes, shop cleared those, and redrove and pulled 18 more codes. The shop said all my codes related to a bad ground somewhere. I have checked all the grounds that I could find under the hood and along the frame. Loosened them and cleaned them and retightened them. I'm still having problems with my truck not running properly. In drive it acts like it's cutting off and restarting itself, every so often the voltage will drop during this but not all the time. At idle, the truck just runs like it is misfiring/skipping. Now, if I drive the truck for more than 30-45 minutes there are strong exhaust fumes present and the truck won't restart for about 30 minutes if I cut it off. I'm to the point where I am thinking of starting to replace sensors one at a time, once a month, because I can't afford to do them all at once. That and the injectors. Fuel system is up to par on pressure. All my vaccuum lines are connected properly and none are leaking. Truck is costing me more to repair than to buy. Am I missing something simple?
have the same problem?
Monday, February 4th, 2008 AT 8:58 AM