I just wonder how many of these trucks have this problem? I work at a dealership and they act like i'm crazy because i have the only one doing it so far. We have reolace a couple of throttlebodys and done lots of reflashes. by the way it doesn't fix it. We're starting to think it is the throttle body on mine that is bad.

 

A couple of times, I've started mine in the morning and it will idle high like it should when cold. I'll go to shift it into reverse to back out and the engine will rev without my foot on the gas at all. The truck will jerk backward and then go back to idling fine.

 

I think it has something to do with the "electronic throttle control"

Check this link out

http://www.courier-journal.com/busin...el14-7100.html

 

We are not crazy! My 2002 Expedition (80000 miles) hase done it 5 times since we bought it. When you come to stop, at the last moment just before the truck stops, the truck's RPM goes up and lurges forward. Luckly your foot is on the brake to stop it. It has seem to happen on long trips. My wife thought I was messing with her, until it happened to her. . Have not called anyone. Would like to fix it.

 

My 2008 does this too. It does it when the vehicle is slowing/coming to a stop. With a foot on the brake suddenly the vehicles accelerator will surge. The first few times I thought I must have had my foot partially on the gas pedal, but with repeated events this was not the case. It stops when you mash the brake. When I approach a stop I give the vehicle in front of me a lot of room. This problem isn’t repeatable so I don’t have anything to show the dealer or mechanic. Any insight into this issue would be appreciated.

 

These trucks didnt use the same manufacturer of the drive by wire parts as the toyota vehicles did, did they? Could be a malfunction like is happening with the toyotas, jjust a thought.

 

This surging and possibly some of the other issues mentioned in this thread are likely due to soot in the throttle body. The soot causes the throttle plate to stick closed, the motor tries to open the throttle with increasing force until the plate pops loose, then the RPM overshoots causing a surge. It will do this over and over again as the throttle plate motor over corrects for the surge and closes and sticks again. Mine did this on a slight incline as well but was getting so bad that it would do it going down a hill with the cruise control set. The speed would drop 5 or 6 mph below the setpoint by the bottom of the hill and then rapidly accelerate back to the setpoint. I had the dealer look at it and they couldn't "duplicate the complaint". I figured out what was going on and cleaned the throttle body and the problem went completely away and hasn't reoccured in 2 years.

 

Maybe some of these trucks have some of those Toyota gas pedals? Many yrs ago, my 'Cuda (tri power carbs) did this to me twice in several yrs. Both times the carb connecting rod came loose and jammed itself into the manifold, resulting in WOT. After about 3 seconds of WTH?, I just shut the key off, and coasted to a stop. This last case of the family that had the runaway car that finally crashed resulting in deaths could have been prevented by shutting the key off, or simply shifting into neutral. I'd rather let it blow up.

 

Probably so.

My only experience before this '07 F150 was my last police car, a '06 CVPI. Took some getting used to, but in 90,000 miles of use, the CVPI never did this. What I noticed is you could very quickly stab the throttle and let up, and then the trans would downshift and then return. Little stuff that you could tell it wasn't same as throttle cables. Trans down shifting on long steep down grades when the cruise was set for instance. A cruise that stayed rock steady on speed with no overrun. A steady idle regardless of AC or electrical load due to lights.

Different, but it was OK. Never had a motor fail but know guys who did have a motor failure so that they suddenly had no throttle, just idle. Sucks big time then.

I know they saved money, made a smoother vehicle, but I think I would have rather they stayed with a throttle cable.

I'll keep a copy of this post. Makes perfect sense to me.

 

WillieB-- I had a 2000 with 4.6 that would do that and it was the IAC acting up

 

Hey Jim......got a picture of your truck??? What engine and whatnot do you have?

 

To answer XJCAMARO's question on the manufacturer of the throttle control, yes. CTS, which is based in Elkhart, IN did manufacture a lot of the throttle controls for Ford as well as Toyota and who knows how many other companies. I had a throttle stick once on an 86 2.9L Ranger once, but it was from carbon build up in the throttle boby that prevented the throttle plate from closing. I pulled over and shut it down. I happened to have a small can of WD-40 with me and sprayed the snot out of the shaft as best I could and it didn't do it again that day. Once I got home I removed the ducting from the throttle body and cleaned it good with throttle body cleaner and never had another problem. On the drive by wire throttle that our newer trucks have, I can't help but thinking that it may be electrical in nature. None the less, I'd clean the throttle body thoroughly and all electrical connections to see if that helps remedy the problem. If that doesn't eliminate the problem, I'd probably ask for a data logger to be installed and drive it for a period and hope it messes up while data logger is connected. Otherwise, it's good old fashioned diagnosis work that dealers don't like to do because it's time consuming and not always profitable short term. I would still suspect either the accelerator pedal assembly or TPS on the throttle body. But it could also be a intermittant wiring fault.