I have a 2002 5.3 in my 83 jeep. I had a computer brick on me trying to correct a vss issue. I replaced the pcm with same yr and model, but ever since then I have a intermitten PE problem. Seems I have no PE until I drive down the freeway for awhile. I can shut the truck off and start it back up and have no PE until I drive down freeway again. Occasionally that doesn't work either. No idea what's going on.

 

PE delay, rpm-time-kpa.

 

post the tune it is probably something simple. Pe delay, tps, there are all sorts of timers, ect..