2000 F250 problems

[amc]

I just bought a 2000 F250 4x4 with 6 speed manual 3 weeks ago. The truck has 106000 miles on it. I started having intermittent problems with the truck losing power. It never ran rough or smoked, it was just very slow revving like it wasn't getting enough fuel. Shut the truck down and it ran fine for a week. I have changed the oil and fuel filter. About a week ago the problem started again but this time the truck would randomly go to idle with SES light on. The diesel shop pulled a TPS code (not sure of # now). I replaced the pedal assembly with a new OEM part. The truck ran fine for a few miles and is back to doing the same thing. The truck will run like normal after setting all night but only for about 1/2 mile then lack of power and randomly returning to idle when shifting. Sorry for the long post but would appreciate some guidance.

[melmount]

will need the codes to help? just a lot of guessing til then. Maybe some scanner info like icp pressures?

[melmount]

Maybe try a new cps first. They are known to go, and even if its not the problem, having a spare is a good thing.

[amc]

Codes are as follows:

P0122 - TP Sensor A Circuit low
P0221 - THr/Pedal position sensor/switch B

Truck runs like a raped ape for a mile or two now and then has about 20% power. No smoke of any kind. Sounds normal but won't rev and no power. Truck thows a code as soon as foot pedal is released.

Any ideas? Thanks in advance for the help!

[eagledieselmedic]

Here are the code break downs

P0122 Ford OBD Code Lookup

and

P0221 Ford OBD Code Lookup

Yep need to look at the TPS. I am sure others on the forum have done and install and can advise you as to proper calibration etc.

[amc]

Appreciate the quick response. Pedal assembly was replaced last friday with an OEM pedal from Ford. Problem persists with same code as the old pedal. You mentioned proper calibration? I did disconnect both batteries as suggested (somewhere I read this!) I haven't been able to locate a calibration procedure. Thanks again for everyone's help!

[amc]

Pulled and cleaned connectors and pins on pcm this morning and reset power. Truck ran better longer but back to the same low power but with no codes this time. Any ideas?

[amc]

Can I try a different PCM from an 01 F350 with auto tranny to see if the problem goes away, or will it not operate with my 6 Speed? Sorry for all the questions, my hair is rapidly disappearing!

[dazdillenger]

Either you recieved a defective pedal, or you have a short in your wiring. I have a few spare pedals, pay shipping and Ill send you one to try.

[amc]

I really appreciate the offer. A friend has an 01 with a known good pedal. If I can find a time he can be without his truck for a little while, I'll try it. Again, that's really nice of you to offer.