Just thought I"d throw this out there. I'll describe my former problem in case anyone else by chance has what I had. My truck would hesitate at around 2000 rpm while moving already. No matter the speed, whether 45 or 65. If I was moving and let off the gas and push the pedal, it would always hesitate/hiccup at 2000 and then would be fine. Never did it from a stand still, would be fine even at and through 2000 which confused me. Always while I was already moving. It turned out to be my MAF sensor. I did what you guys hate. I threw parts at it ha ha. I did it more out of frustration/desperation and bam! fixed it immediately. Rock Auto $50 something bucks so I figured why not. Everybody always talks about cleaning them which I did and then kind of rules them out as the problem along with the throttle body of which mine is new. Never threw a code. Anyway, one problem fixed and on to the next one..... Hot start issue. Maybe I"ll throw some money at that and update he he. Just kidding. Im not trying to diagnose anyones hesitaion cause I know it can be many things but I replaced so many parts there was'nt much left. So... don't rule out you MAF just cause you cleaned it. Good luck everyone

 

Humm..... which brand did you buy ?? Motorcraft one is $120

 

It said Hitachi was the OEm so Hitachi. I know,,,,,,,,, i usually go motorcraft but....