1992 4.9 problem
Hey there guys I have a problem with my 92 Ford f150 4.9 and have no idea what to do next. Here's the run down a couple months ago I was at a stop light and the rpms suddenly dropped and got all erratic. From that point on it had trouble idling. I drove it for a couple months after that but it got worse and worse. I was forced to feather the throttle to keep it running. Now here is a list of parts replaced that did nothing for the problem. Fuel pump, fuel filter, distributor, cap and rotor, plugs and wires, throttle position sensor, fuel pressure regulator, EGR solenoid, ECU computer. Im probably even forgetting some. But none of these have helped. The truck starts but you have to continually pump the gas to keep it running. There are moments when it will just purr for a split second then go right back to running horribly. So please if you have any suggestions I would greatly appreciate them. Im at the point that I've put so much into it I refuse to give up now!