1986 F-150 302 EFI has a bad miss at times after reaching operating temp. I have replaced spark plugs, wires,
distributor cap, distributor, rotor button, module, fuel pump, fuel filter, egr valve. pcv valve, the switch under the dash which shuts the engine off when rear ended. Sometimes it runs fine and other times it misses as soon as it reaches operating temperature.
It seems to be worse in warm weather. It sputters, backfires thru the intake manifold, and has just stalled completely. It will always restart after sitting for about 20 minutes, but will miss pretty bad and will run fine if allowed to cool completely. I don't know what else to do. Please help
distributor cap, distributor, rotor button, module, fuel pump, fuel filter, egr valve. pcv valve, the switch under the dash which shuts the engine off when rear ended. Sometimes it runs fine and other times it misses as soon as it reaches operating temperature.
It seems to be worse in warm weather. It sputters, backfires thru the intake manifold, and has just stalled completely. It will always restart after sitting for about 20 minutes, but will miss pretty bad and will run fine if allowed to cool completely. I don't know what else to do. Please help
Jan 20, 2009 at 11:13 PM