Ok so im a newbee i just recently got a 2004 f150 5.4, and it was running good it just had a random jump in rpms low high low high, so i went to autozone and the code read it was my IAC but they said it might be my MAF sensor that was dirty so i bought MAF cleaner and cleaned the sensor and the plugs on the tps and also cleaned the throttle body and it worked no more rpm bounceing. But then i had to turn on another project i had and took the battery out of the f150 after about 30min i reinstalled the battery i turned the truck on and turned on fine but i put it in gear and the gas pedal didnt respone it would just go to the floor so i thought i might of damaged the gas pedal sensor so i went to my local junk yard and bought another one and same thing the mechanic down the street said i had to reprogram the computer and buy a new throttlebody but i keep reading it might be the tps and i might have to calibrate it its my first ever Ford any suggestions

 

ok from what i have been reading on here it seems to be the tps i will replace it tonight and will let you guys know how it went

 

wow you work fast we didn't even have time to respond

 

Did you check your connection at the TAC (Throttle Actuator Control)? This is a fly-by-wire system that is part of the Electronic Throttle Control module. The Accelerator pedal has 3 sensors - that essentially tell the throttle actuator control what to do. If the thottle actuator motor does not receive a signal from the ETC module - it will not open.

BTW - your truck does not have an Idle Air control valve.

Your initial problem was probably a sticking Throttle plate. This can be common - if you have a K&N or similar - aftermarket breather element.

Hope this helps.

 

ok well i changed the tps and no luck it runs like ***** i have check all the connections and cleaned the throttle body and i went and bought a OBD II scanner and i keep getting p2104,p2111,p2112 let me put my old one on and see what kind of codes i get

 

OBD II codes

P2104 --- Throttle Actuator Control System - Forced Idle
P2111 --- Throttle Actuator Control System - Stuck Open
P2112 --- Throttle Actuator Control System - Stuck Closed




(found here----- OBD-II trouble codes - GearHeadWiki)

 

This is a somewhat common problem, especially if you are running an oil charged (like K&N) filter. You probably need to clean your throttle body and throttle plate. I run a K&N filter and as part of my PM, I clean my TB every time I change the oil. Try This:
*Remove the intake duct work.
*Disconnect the MAF sensor connector.
*Remove the Crankcase gas recirculation line.
*Remove the Breather assembly.
*Have an assistant turn the key to the on (do not start) position and depress the accelerator fully and hold. This will hold the throttle plate open during the cleaning process.
*Using throttle body cleaner and several lint free rags, clean the throat of the throttle body and both sides of the throttle plate.
*Have your assistant (which could be a stick between the drivers seat and the accelerator pedal) release the accelerator and turn off the ignition switch.
*Allow the throttle body cleaner to evaporate (10 minutes) while reassembling the intake and related components.
*Start the engine and allow it to warm to operating temperature.
*Turn engine off and clear your DTC’s.

Hope this helps.

 

ok i put my old tps back on and my truck starts right up and doesnt run ruff now the only codes it keeps reading are p2104, p2111 and also my gas pedal is STILL LIMP nothing works. so tommorow i will refuel my gas tank with a gas treatment and let it run through some cycles and see if the computer recalibrates or i may have to go buy a throttle body. All this just because i disconnected the battery i have never encountered this problem on my other vehicles.

1) so i have changed the gas pedal sensor( wasnt the problem)
2) tps
3) cleaned all connectors and checked wires
4)and know ????????????

 

and now , you man up and do what sako 75 told ya. it all makes sense man. if that doesnt do it, try resetting your pcm again. unplug the battery for 10+ minutes and see if that doesnt work. it works when i get the blue screen of death on my laptop, so it might apply here

 

Rammp

I am genuinely concerned about your problem. I got to thinking - on my '04 5.4 L - the tps is not serviceable. It is a part of the electronic throttle body assembly (this changed in 2005). I am trying to find out if we are on the same page. I would like to help if I can. PM me if you like, I will send you my tel. #.

 

Rammp
What did you do to fix your truck? I have the same codes P2104 & P2112,
same problem.
Thanks Dwayne

 

I just joined this forum and I realize this is an old post but my 2004 F150 is throwing the same codes, I was wondering what actually fixed your truck. Any help would be appreciated!

 

Those codes don't tell you what the trouble is.
Only the results the trouble caused the system to shut down from.
There are a number of possible causes
If you read the code descriptions they tell you that the system is taken out of service so the truck won't run away uncontrolled because it is electronic control not cable control.
Good luck.