Help, I have a 2002 7.3L diesel that will not accelerate. It will idle all day. I have replaced the throttle pedal twice and am still having the same issue. I'm hoping someone can give me some information on the throttle schematics so I can diagnose the electrical system for the throttle pedal.

 

Is part of your dash dead? Did u check your fuses? It seems like it is fuse 45. If it is blown, more than likely the OD switch wiring in the column has rubbed to blow it.

 

Sounds like a blown fuse to me too.

 

All the guages are working. I checked all of the fuses anyway. When you push on the Acc. pedal the check engine light comes on whether the truck is running or not and there are no codes set .

 

Subscribing.New one on me.

 

Does the CEL go out when you take your foot off the pedal? Sounds like there may be a short somewhere. There should be a code stored if the CEL is on.

 

I was thinking more like Fuse #19. I had this problem about a year ago and it freaked me out. I finally found the fuse blown and all is well. All I had done was install a new stereo. Just plug n play so I thought I had really hosed something up.

 

Your accelerator pedal is bad. The IVS (Idle Validation Switch) is probably not shutting off, or the potentiometer in the pedal went bad.

Hopefully you do not have adjustable pedals as the pedal assy. can be expensive for those.

Here is a video of the interaction between the IVS (lower screen) and the throttle pedal as I slowly apply throttle to full and then back to idle.

YouTube - Throttle Pedal AE Video

 

Where are u getting the pedals u are installing? Seems like some of the guys have problems with some of the aftermarket pedals

 

The CEL goes out when you take your foot off of the Acc. pedal.(Still no codes stored) I have bought the Acc. pedal from a Ford dealer ( Which this pedal is different from the original. A different design.) The second pedal looks exactly like the original.

 

To All,
I have replaced the Acc. pedal for the 4th time and the problem still keeps coming back. This pedal lasted 1 week. I have not blown any fuses and the truck runs good except for no acceleration when this happens. I have checked the voltage at the IVS and there is 12 volts when not running and 14 volts when running. There is only voltage on 1 side when the pedal is pressed or not pressed. I have installed a bypass circuit when I replaced the last pedal (Tired of being stranded). When the truck stopped accelerating this time I put my bypass switch in drove away. As far as I can tell the IVS switch is either on or off . Anyone have any suggestions on why the switch is always going out ? It seems unlikely that I would purchase 4 bad accelerators in a row. Right now I am driving the truck with the IVS bypass circuit that I have installed.