2007 F-450 No Throttle Response

[tennstroke]

I have a throttle issue with an 07 F-450. All fuses are good, and I swapped the throttle pedal with a known good one, and still no response. It starts and idles fine, just no pedal response. Any ideas would be greatly appreciated!

[tennstroke]

I checked the wiring from the tow/haul switch and it is fine. Still stumped on this! Anyone have any suggestions?

[grassfarms]

i am having the same problem today on a 99 f250. I know someone that had this problem and replaced the glow plug harness to fix it. It was creating a short. Take this for what it is, third hand info.

[grassfarms]

Thanks!

I looked those up on "Alldata" and sure enough it sounds like what could be giving me fits. They say


Quote:
The Idle Validation Switch (IVS) provides the powertrain control module (PCM ) with a redundant signal to verify when the accelerator pedal and shaft is in the idle position. Any detected malfunction of the idle validation switch (IVS ) will illuminate the Check Engine Light and the engine will operate at low idle only.

The TPS is probably sending a conflicting signal which explains why there is no check light till I depress the pedal.

Might have something to do with the temperatures since I haven't had problems during the warmer months but last year it did the same thing a few times.


These have been the main issues I have found in this forum, if they are both on the pedal, then you covered that base already. I tried mine again today and like other people, once it warmed up for approx 3 minutes it went to working fine with normal throttle response. This seems like a typical corrosion response to me but I may never find it. I am going to try a new TPS and see if that works. No fuses were bad. Unless there is a sticky relay in this circut it will be like a needle in a haystack. Others cured this by simply cleaning the connections in the wire harness.


Good luck

Mark

[forddieseldoctor]

the 07 does not have an idle validation switch. check for 5 volts on the tan and the gray/black wires. check for ground on the black /orange and the black/white wires.

[tennstroke]

Thanks, guys! I'll update when I get it figured out.