Intermittent Engine Stall

[mudrunner88]

Symptoms: Start truck and it runs fine. It warms up and it will only idle. If you blip the throttle or floor it the 22re will skip and sputter and choke. Let off and it idles fine.

Continue to run it at idle and when it's at full operating temperature it won't idle and shuts off. With luck it starts hesitant again and idles rough.

Let it cool down for about 20mins and it runs fine again...but once warm it repeated.

Let it cool down for about 45mins while checking out everything else and then fired it back up. Ran fine at all RPM's...Let it run at idle for 1/2hr to full temp and it was fine. Drove it around the block at all speeds and RPM's and it was acting like nothing was wrong with it?

This is the second time this has happened...The first time it was the same deal but I couldn't get it running for a day. Then it was fine and I found a bad TPS so I swapped that out.

Now I am having the same issue again.

It has a new fuel filter and Supra High PSI fuel Pump from Walbro.

The only engine mod out of the ordinary is my 5mg AFM. Next time it does this I am swapping in the 22re AFM again to see how it acts.

Anymore ideas??? It did rain last night and I did have the truck in the water up to the body line...I pulled the computer and the area was wet near all the wires but the computer itself was dry.

I'm thinking if it were electrical system wet than it would do it all rpm's not just when the throttle plate opens up. A little confusing for me.

Ideas are welcome.