Can you suggest what might be the problem? Why it might run smooth cold, but run rough hot. After driving it a couple of miles it starts to sputter and loose power. I drove it up to the gas station which is a couple of miles from my house. I got there fine after turning the truck off and pumping gas into the tank. Driving out of the station was really rough and I barely made it home. I need to know what to check next. Could spark plugs be the culpret?
I'm thinking possibly the pressure regulater valve since it is a fuel injection engine. I'm not real familliar with this type of engine as far as trying to repair it.
There are quite a number of possibilities, but without some diagnostics being done it is very difficult to recommend anything beyond the things you have already tried. Since you state that you have already changed the spark plugs then I would not recommend changing them again. I will opt out and allow other experts to review your question and offer suggestions. Thanks, Steve
The code 18 is for the TFI module mounted on the side of the distributor. Replace the Module and I would also recommend replacing the stator inside the distributor. We always recommend replacing these two items together. The distributor will have to be removed to replace the stator inside the distributor. This module controls the spark for your engine.
Sorry I'm a little late.
The Haynes manual is generic for Ford. If you have a TFI module mounted to the side of the distributor, you have a stator inside. It is the trigger wheel that tells the ECU where cylinder #1 is and fires the spark plugs in the proper firing order. Replace the stator and your truck should run properly.