I bought a 2000 f350 with the 7.3l diesel in it a few months ago with 119,000 miles on the truck. I drove it for around 8,000 miles and started having a problem when accelerating. When the truck is pulling itsself either on flat ground or up a hill or whatever, just as long as you have to accelerate, you get to about half throttle and the truck starts to shake, kind of like it is running out of fuel, but if you push the pedal to the floor it will power through it or if you back out of the throttle a bit it stops as well. I had a mechanic look at it and they can't figure out what may be causing it, and don't want to just start throwing parts and money at the problem. So far the computer was changed because we thought the chip may be causing it, so unplugged the chip and it erased the computer, changed the electronic pedal, changed the oil thinking it may be foaming, and checked the injector harnesses and can't figure it out. I don't know very much about trucks, but I have to get this figured out and would appreciate any input or thoughts. Thanks Adam

 

First thing I would check is the carrier bearing.

Pap

 

I'm thinking it's a fuel problem, you can hear the motor cut out and sputter between 1600-2200 rpms but as soon as you either back out or throttle through it it's fine. I just don't know what would cause this.

 

Thread moved to 1999 - 2003 7.3L Power Stroke Diesel forum.

 

Assuming that your hunch of a fuel problem is on the right track, the symptoms you describe would have me looking at the IPC/IPR functions. This is best done using a tool such as Autoenginuity, monitoring Injection Control Pressure and Injection Pressure Regulator duty cycle. The IPC is a sensor sensing the pressure of the high pressure oil system that drives the injectors and the IPR is the solenoid on the HPOP that responds to the PCM demands for changes in the injection control pressure.

Both parts are known to fail and are fairly expensive to replace, so you don't want to just throw new parts at it. One quick check is to pull the connector on the IPC and inspect for oil in the connector. If present, the IPC should be replaced at a little less that $140 for the part from Riff Raff Diesel: Riffraff Diesel: Sensors.

You could also check for leaks a round the IPR on the HPOP, but leaks there don't necessarily mean a defective IPR. The IPR is a little less than $200 from Riff Raff.

If you throw those parts at it, you'll have about $340 plus labor in the thing with no certainty that they need to be replaced. Autoenginuity with the enhanced Ford bundle goes for about $360 and is a very worthwhile investment if you plan on keeping the truck for a while. Or maybe someone in your area already has the tool and could do a quick assessment, but I'm not sure where you're located.