As the title says, I have an 02 Supercrew with the 5.4.
The engine starts when cold and runs fine but sometimes when I start it hot after running for a bit, it will stall out unless I keep my foot on the gas pedal. This seems to only happen on hot days. It was about 90 F here yesterday and I drove it to a shopping mall after supper - maybe 5 miles. It sat for maybe 20 minutes and when I re-started it, it stalled out. The tach needle just drops slowly to zero and the engine stops. It will re-start without any problem but will only keep running if I keep my foot on the gas and keep the revs up a bit. It has done this a few times in the past few years and only on hot days after it has been running and then sat for a few minutes.

Anyone encountered this issue and have an answer on what I should look at? It does not throw any codes and generally runs ok after a few minutes. For example, last night I managed to keep it going by shifting into neutral when required until I got back on the road. I drove 2 or 3 miles and at the next light, it acted like nothing happened.

 

The intake air controller is malfunctioning.
The intake air sensor may be out of calibration.
Since you can keep it running by foot indicates the IAC is not controlling the air to maintain idle.
Good luck.