No check engine light. If I cruise along at an idle, and then give it gas. It dies. 94 250 5.8 liter. It always starts right back up. I took it to my local mechanic. No codes. He cleaned the throttle body and checked the fuel pressure. It's still doing it. Any suggestions? This is really bothersome when I am driving slow like when driving the pipeline trail out to my remote cabin. It's very rough and I have to creep along. Dies almost every time I step on the gas.

 

Does it happen only off road? How often does it happen? MAF,ERG Sensor, TPS, ??? no codes?
If only off road, wiggle some wires??

 

No codes. It will do it any time I'm just idling along and the give it gas. Doesn't matter whether smooth road or rough. Seems to not die until after I've driven a few miles.

 

Read this page. I know you don't have any codes but, it worth a shot?
http://easyautodiagnostics.com/ford/...sensor-tests-1

 

Still running the factory exhaust at 110,000 miles. Could the catalytic converter be causing this?

 

Thanks, RevBiker. I have been suspecting the tps, and will pass this info on to my mechanic who has my truck.

 

Cat's should be
OK

 

unplug iac and see if there is a difference. Some say you can clean them, I fried one trying to clean it. New motorcraft plugs, and new msd wires, cap, and rotor is what these trucks like. Stocks cats do suck on these. If you have a good welder buddy, you can get catco 2.5" highflow cats cheap off ebay. Have one welded into your factory y pipe. If you don't have the factory cats you can remove the pulley off the smog pump and run a shorter belt. Or just leave it as is, doesn't matter.

 

My mechanic is suspecting the IAC. I told him to go ahead and slap a new one on. If that doesn't fix it, will try a new TPS next.

 

tps he can diagnosis with a multimeter.