I have a 2001 f150 with the 4.6 with 181,xxx miles. my truck drives fine when the engine is cold. and when driving 60-65mph the truck skips a little then when idling the truck hesitates and acts like it is going to stall. I had the spark plugs changed, fuel filter, IAC. I had the throttle body ported and polished and intake elbow. before I had that done the throttle body was full of carbon and I never changed the egr and was wondering if that could cause it. I don't have any engine codes or light

 

Might be time for one or more cops. Wouldn't hurt to pull the EGR valve and clean it.

 

I'm thinking it is the egr but I will find out tomorrow after I get the egr off

 

I took the egr off today and it was clogged up with carbon and cleaned it and seems to do better