Open the reference in your internet browser, then highlight this web URL in the upper window of the browser, and paste it into the FTE edit window, and then select preview to make sure it looks ok, and then hit submit.

 

I'd be looking at the wiring to the IPR......

 

Just read this....


In my trouble shooting efforts before I had the codes read I uncovered a BIG problem that I never have seen before posted here or on other sites and seems to reason that this was very IMPORTANT on all of these 7.3L engines. The closest thread that I could find was dealing with replacing the CPS Cam Position Sensor when the engine would began running poorly or would just die while driving on the highway. I had replaced the CPS and this problem still existed.I could not get passed the feeling that this was a electrical problem I was chasing .
Problem # 2
I found that the wiring harness that has a brass looking bolt through it that holds the wiring plug through the firewall into the on board computer the GEM Generic Computer Module was loose . I could move the GEM inside the cab or wiggle the mass plug under the hood at the drivers side firewall and the engine would die, just as if I was on the highway and hit a bump which we have a lot's of here in South Louisiana .

I found that I could duplicate the problem by simply moving either of these 2 parts [the outside connector or the GEM itself. The factory protector box was missing when I bought the truck 2nd hand. I simply tightned the single bolt in the harness after making sure it was plugged in all the way into the GEM. There are numerous engine connectors that have these securuty bolts through tham. I feel that this harness bolt had loosned through time, extreme use and temperature changes.

The combination of these two problems has baffled me for months.
I truly hope that this will help other F-250 owners should they experience simular problems.
Clark

 

Took it to the dealer this morning and explained my situation to him. He said the glow plug light staying on was the key. That means a short to ground. The SES light and water in fuel light somehow led him to the main engine wiring harness. He said there has been a TSB issued on this where the wiring harness rubs against either the valve cover, or in my case the side of a hole in a bracket the wires run through. He removed the plastic "protective" wrap and found 2 wires where the insulation had been rubbed through. He said the short in these 2 wires was trying to cause the the PCM to reset causing all my problems.

FYI. The wiring harness involved is on the driver side under and just barely in front of the plastic turbo intake hose. There is a square box mounted to the engine and the wires coming off that is apparently a fairly common issue with the 7.3's. The mechanic said this was covered when he went to the Ford diesel school.

He also stated that the other 2 common harness problems are either in the steering column where the harness has slipped and is rubbed by the linkage, or some trucks have wiring that rubs against the top of the driver shock. My 02 does not have the wiring over the shock but he said some do.

Thanks for all the input and I hope & pray this guy was right.

 

Hmm, same harness Gene was checking (he doesn't like the term fooling around with) on my engine despite there being nothing wrong. Hope you're good now.

 

Well, I guess myself and lots of others will be checking our wiring harness tomorrow.

 

You have to remove the turbo inlet hose to really get to the wires so you might as well clean and check things out while your there. Also add a roll of electrical tape to the CPS you keep in the glove box.

 

Below are two pics with the hose removed. In the first pic, you should be able to slide your fingers between the wire bundle and the valve cover as you can see I did from the disturbed dust pattern on the valve cover just before I took the pic and started doing my CCV mod. DON'T mess with these wires when the engine is running because they carry 120 VDC to the injectors!

 

I did that and it was starting to wear through the outer layer of insulation. A lot of turns with electrical tape with a semi-annual check added to the service list for me.

 

thanks for the pics. Now, I know what I will be looking for.

 

Why don't I have a little triangle with the red border in my upper right hand corner like everyone else? I just noticed this, and I'm already starting to feel paranoid about it!

 

It is to report a bad post to the admin. you can't report your own posts. you have a triangle that is visible to us, just not you. Calm down everythings o.k.

 

What is the oter symbol mean, the one that looks like a tree or something? It is a link to somewhere. Didn't want to click it since I didn't want to say something I didn't know what I was saying LOL

 

Rep points. hold your mouse over it and a note will pop up telling you what it is for.

Dave

 

I just went in and taped up the wire bundle that eugene posted pics of last night. There was one wire that was beginning to show some wear on it.