[nator_0007]

I have a '93 ford F150 supercab, 302, automatic, 4x4.

Here is the problem:

After the engine reaches operating temperature and I proceed to drive it around for 10-15 min longer. It starts to miss at low RPMs and seems to be running a little rich overall. When its cold it runs fine.... no problems.

I have already replaced the coolant temperature sensor, aircharge temperature sensor, fuel filter and ignition module. I have spark on all cylinders. And fuel pressure is normal.

I am right now in the process of running a couple of tanks of gas with fuel injection cleaner through to make sure there is no debris in the injectors.

Any ideas as to what else this might be??? Let me know if you need anymore information on the problem.