Most likely issue is your accelerator position sensor. Recommed you remove it and test with an ohmmeter. I don't have the pinout, but there are only four pins. Find the two pins that have a change in resistance when the arm is rotated. The resistance should change smoothly as you rotate the arm. If it jumps around, replace it. Cost is about $75.
SOURCE: Ford C-max acceleration problem
What they mean by clearing the codes is your vehicles computer should have turned on a light on your instrument panel to alert you of a problem. The computer stores these problems for service to find with their gauges. When the battery is disconnected for 15 minutes it can clear most codes, leaving a blank slate to record the newest problems. The service people could have cleared the codes for you on your way out and they really did not help you .
Check under the hood for labels for vacuum line routing, and vacuum lines hanging off or in the wrong positions. Check your transmission fluid levels. Sometimes vehicles use vacuum lines to make transmission parts work.
SOURCE: Shifts hard and jerks under hard acceleration.
thottle positioning sensor? if trans has overdrive could be a lock up piece, dont remember name of it. there is a lucas oil product that might help. if it is the overdrive.
SOURCE: Ford Contour (2.5 V6 manual) jerks badly with throttle modulation
Check the lower motor mount near the drivers side. This usually is a problem with these cars. It costs about 140.00 or so depending where you reside. Also check the passenger side hanger bearing on the CV shaft if this is loose it will cause jerking too.
Testimonial: "turns out something caused the cv joint to rupture horribly and the axle ended up with about 2 inches of play. thank you for your help."
SOURCE: 98 ford e 150 van idles in park fine. But when
Did you try changing plugs and WIRES!! wires are the most common cause of this problem, under load if you have a bad cracked wire it will "leak" the spark causing a weaker spark there for making your spark at the plug weak not burning the entire charge in the cylinder. If this still doesn't solve your problem being the cheap way (im sure it may fix it) try by changing your coil packs let me know what happens. If all else fails you may have a sloppy injector
SOURCE: 2000 ford econoline jerks
It does it more uphill because the engine needs more fuel. Its starving. How about replacing the fuel filter.
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