7.3 Throttle Response Problems
#32
20 min & some electrical tape to fix :-roll
Solved!
Found the short. When my dog was a puppy - he chewed the shifter handle while I was out of the truck looking for a trailer. (I was proud of him for resisting the paper bag of french fries sitting on the dash....) - fast forward to a few years later, and the shift handle finally came apart at the seams. It worked, it's just ugly - but allowed enough movement to chaff the small wires inside the shift handle. A dab of liquid electrical tape on the wire itself, and about 3 ft of electrical tape wrapped around the handle have it working until a $65 replacement handle arrives in the mail.
Edit: This also fixed my unusual problems with throttle response under hard cornering and hard acceleration.
Super easy fix now that I know where to look.
If your dog didn't chew the handle like mine - open it up and check the wires in the column where you'll most likely find the short. If you get in a bind - you can just unplug the connector inside the column for the over-drive button, pop a new fuse in and drive the truck as long as you want... just without the convenience of the overdrive button.
Here is an excellent write up from Ken on another forum. This write up had me in and out with a completed repair in under 20 min.
https://docs.google.com/a/doublermfg...M2Q5YjdmODQ4NQ
Found the short. When my dog was a puppy - he chewed the shifter handle while I was out of the truck looking for a trailer. (I was proud of him for resisting the paper bag of french fries sitting on the dash....) - fast forward to a few years later, and the shift handle finally came apart at the seams. It worked, it's just ugly - but allowed enough movement to chaff the small wires inside the shift handle. A dab of liquid electrical tape on the wire itself, and about 3 ft of electrical tape wrapped around the handle have it working until a $65 replacement handle arrives in the mail.
Edit: This also fixed my unusual problems with throttle response under hard cornering and hard acceleration.
Super easy fix now that I know where to look.
If your dog didn't chew the handle like mine - open it up and check the wires in the column where you'll most likely find the short. If you get in a bind - you can just unplug the connector inside the column for the over-drive button, pop a new fuse in and drive the truck as long as you want... just without the convenience of the overdrive button.
Here is an excellent write up from Ken on another forum. This write up had me in and out with a completed repair in under 20 min.
https://docs.google.com/a/doublermfg...M2Q5YjdmODQ4NQ
#34
Hopefully someone can lead me to the right direction. 1999 F350 7.3. No throttle response. Would run well, then SES light comes on and no throttle, then it would go off and I can drive. Purchased a new TPS and replaced it. Checked the IVS with a ohm meter and its good and not sticking. The overdrive light comes on. I even put the old TPS back on and still no throttle. All fuses are good. Not sure what to try next.
#35
#36
#37
Fixed my 1999 F350 SD 7.3
It was the IPS (Idle position sensor) under the throttle pedal. Instead of paying $400 plus for a whole assembly I purchased the existing micro switch that was there already from one from Ebay. About $10 for two of them. Re-soldered the connections and now works great. I originally replaced the throttle position sensor. No one carries these so I purchased one from Amazon. Its a motorcraft DY967 that is supposed to work but when I installed it on my truck it did not. Maybe it was faulty but the ohms when I checked it were not even close to the one I had on my truck that was still working. Put the old one back with the new macro switch and now runs great. I think the DY967 is for a F350 SD but with a gas engine. Still trying to find one that fits so I have a spare if my original one goes out.
It was the IPS (Idle position sensor) under the throttle pedal. Instead of paying $400 plus for a whole assembly I purchased the existing micro switch that was there already from one from Ebay. About $10 for two of them. Re-soldered the connections and now works great. I originally replaced the throttle position sensor. No one carries these so I purchased one from Amazon. Its a motorcraft DY967 that is supposed to work but when I installed it on my truck it did not. Maybe it was faulty but the ohms when I checked it were not even close to the one I had on my truck that was still working. Put the old one back with the new macro switch and now runs great. I think the DY967 is for a F350 SD but with a gas engine. Still trying to find one that fits so I have a spare if my original one goes out.
#38
Fixed my 1999 F350 SD 7.3
It was the IPS (Idle position sensor) under the throttle pedal. Instead of paying $400 plus for a whole assembly I purchased the existing micro switch that was there already from one from Ebay. About $10 for two of them. Re-soldered the connections and now works great. I originally replaced the throttle position sensor. No one carries these so I purchased one from Amazon. Its a motorcraft DY967 that is supposed to work but when I installed it on my truck it did not. Maybe it was faulty but the ohms when I checked it were not even close to the one I had on my truck that was still working. Put the old one back with the new macro switch and now runs great. I think the DY967 is for a F350 SD but with a gas engine. Still trying to find one that fits so I have a spare if my original one goes out.
It was the IPS (Idle position sensor) under the throttle pedal. Instead of paying $400 plus for a whole assembly I purchased the existing micro switch that was there already from one from Ebay. About $10 for two of them. Re-soldered the connections and now works great. I originally replaced the throttle position sensor. No one carries these so I purchased one from Amazon. Its a motorcraft DY967 that is supposed to work but when I installed it on my truck it did not. Maybe it was faulty but the ohms when I checked it were not even close to the one I had on my truck that was still working. Put the old one back with the new macro switch and now runs great. I think the DY967 is for a F350 SD but with a gas engine. Still trying to find one that fits so I have a spare if my original one goes out.
Also, the other switch is an IVS ( Idle Validation Switch).
#39
I need to spend some time learning the system...
I have a 1996 f250 4x4 7.3 diesel.
I really like this truck. It has had a faulty speedo since I bought it. I have replaced the sensor on the rear end and pulled the cluster,checked for burnt traces and cleaned/replaced bad bulbs and reinstalled.
Still no speed ometer. Thus eratic shifting and very hard shifting.
Somehow during these repairs, I lost my accelerator pedal.
From reading various posts here I am going to search for a used pedal assembly.
I know just enough to get me into trouble...but the pedal went out while I was repairing the dash. I am assuming I have computer or ecm troulbles.
I have a mac ET 1205AN scanner. it pulls NO codes. If the engine is running during the scanning process...the scanner causes it to miss eraticly then die.
Any ideas would be appreciated...
I really like this truck. It has had a faulty speedo since I bought it. I have replaced the sensor on the rear end and pulled the cluster,checked for burnt traces and cleaned/replaced bad bulbs and reinstalled.
Still no speed ometer. Thus eratic shifting and very hard shifting.
Somehow during these repairs, I lost my accelerator pedal.
From reading various posts here I am going to search for a used pedal assembly.
I know just enough to get me into trouble...but the pedal went out while I was repairing the dash. I am assuming I have computer or ecm troulbles.
I have a mac ET 1205AN scanner. it pulls NO codes. If the engine is running during the scanning process...the scanner causes it to miss eraticly then die.
Any ideas would be appreciated...
#42
#44
Help
Ok I have a 2001 7.3 superduty. I was driving the other day stopped at a stop light and it died and wouldn't restart I've changed all the sensors still nothing so I dug deeper looking at injectors did a buzz test everything went fine. I have had some problems with the throttle pedal to where it's start and idle but I'd have to tap it sideways to make it accelerate. That was before it died. If the throttle positioning sensor went out could that be a reason why it won't start now? I ran out of things to do and I could really use help and advice.
#45
The TPS could be a problem not starting. I believe yours also has a recall on them. My 1999 did but I just opted to by one from Ford and put it in my self. As far as the acceleration not working try the micro switch on the pedal assembly. Mine was working intermittently. I had to hit the pedal a few times for it to work. Got stuck in the middle of a few intersections. If that switch is not working your truck will idle but not accelerate. Instead of buying the whole assembly ($500+) I just replaced the micro switch with the same brand I found on Ebay. Need to drill out the existing holes in the macro switch to fit a 8-32 or 6-32 screw, then mount it in the pedal, Loctite the nut and reconnect the wires. Works great now.