FordGoFurther

I decided to purchase a friends 2004 F150 FX4 with 5.4 to use for work. They had issues and rebuilt the Cams. No ticking or knocking noise at all. I bought it for 5K. It is in very good condition and has just over 200k. I found they had a hesitation they could not get rid of and found they had vacumm lines crossed up. Solved that issue. I put on my BBK and K&N from my old truck and that also seemed to improve it. I now only have a code that says the Accelertor Pedal sensor is bad. What is happening is the engine feels bogged down and feels like a misfire sometimes and loss of power mostly when trying to accelerate quickly or on a incline. Would almost think it is a trans issue but i really think not. The engine light will flash a few times and then when it smooths out it will go away. Yesterday the wrench light came on and then was gone after a restart. So I thought I would remove the one from my old F150 regular truck and put on this FX4 and found they are not the same (Can it be swapped?). Before I go and buy this expensive OEM only item do any of you have any suggestion?
Oh I did notice on some of these threads about putting the key on but not start and press pedal down and back up quickly. Since I changed the throttel body and CAI should I do this procedure. After I changed these items I had disconnected the battery and have run for about 2k miles but it has had this issue since I got it and is only getting worse.
I have new plugs I am going to install and have new coil packs on order and waiting to arrive.
All your help will be greatly appreciated.

Martian

Flashing light means you have a misfire. When were plugs and coils last changed? Also get rid of that CAI until all this is solved.

FordGoFurther

They said they replaced at at 150k miles when they rebuilt the cams. I have the new Motorcraft plugs and have order the coil packs.

Martian

That's where I'd start. New plugs (SP-515), coils, boots, and springs. Make sure to grease the boots and springs with dielectric grease.

FordGoFurther

Thanks LaMartian, I will do and let you know results.