Hi. My truck (see sig) has had this problem for quite a while, and its getting pretty annoying. When accelarating, from a stop and sometimes normal driving, it seems to hesitate around 1800 rpm. It is most noticable in first and second, but sometimes I think I can feel it in third. Once I get to about 2000 rpm, I can feel the power kick in and it drives like it should. Any ideas? If I failed to mention something, or you need more info, let me know. I'm on here pretty much all day (but don't tell the boss!! ) Thanks!!

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2000 F-150 XLT, Silver, R/C, Flareside, Sport Package, 4.6L V8, 5-Speed w/ 3.55 Gears, Flowmaster, A.R.E. "Lowrider" Fiberglass Tonneau, Superchip, 2" Drop Shackles, Lightning Front Bumper,Street Scene Speed Grilles,APC Speed-Glo Gauge Face, AiRaid FIPK

 

I have the same problem around 1200 rpm I've tried every thing! And if I gun the engine I get a loud knock! I can use some help also!

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1998 F150 Triton 5.4L (4x2)
K&N Air Filter
Pioneer 4100 W/remote
2\10" Rockford Fosgate Punch He. RFP4310
CatBack system with Magnaflow system 3" Pipe
3.5" Fatech spindle lift with fabtech shocks and 1.5" rear blocks
3" Performance Acc. Body lift, with lift lips
Xenon HID Super Whites 9007's
Front Clear Corners
Sonnax Line pressure modulator kit model#AX4N

 

Anybody? Come on guys, I trust you more than the dealer.

 

SILVER,
MY TRUCK SEEMS TO HESITATE/SURGE WHEN I'M IN 3RD OR OVERDRIVE. AND BETWEEN 45 AND 50 MPH. DONT KNOW IF ITS THE ENGINE OR THE TRANSMISSION SLIPPING????