Has anybody experienced only one bank(2,4,6,8) of glow plugs not working. I haven't gotten into it yet but it looks like there is only one relay for the glow plugs? If that is the case i am thinking that there are two seperate connectors, one for each bank. It just seems logical because only the even cylinders are affected.

 

All the even numbers are on the drivers side. The problem is the UVCH (under valve cover harness) may be loose. How does the truck run and idle?

 

Thanks Rick,

The truck idles/runs fine. Just have had the codes for awhile and figured I better start to look into it. I will check the harness that you referred to this evening when I get home.

 

You know I have to pop in here and ask if the Under Valve Cover Harness (UVCH) connector has been looked at and the 50 cent mod done? 50 cent mod video here
2001 F350 7.3L Turbo Diesel, UVCH - YouTube

How to do it written down from my post in another thread. The video above is not my video but is a great training tool.

For the 50 cent mod you will need two quarters, a short 13mm socket, deep 13mm socket and a universal or wobble short extension to get the back bolt on the drivers side and a few of the bottom bolts on the passenger side, a 13mm wrench and a long(6-8 inch) extension. Various wrenches and sockets for pulling harness connector and Intercooler boot clamps.
Only takes 20-25 minutes to pull the Turbo intake hoses and Turbo pipe(metal) on the driver's side. Be careful with the boots. Just be easy with them.
Don't pay too much attention to all the oil inside of the inlet tube and metal pipe as you can clean them any time IN THE FUTURE.
Right now focus on taking the valve cover off. I take out the stock filter and all the inlet tubing going to the turbo then I gently shove a not so good towel into the stock filter box AND lay a moving blanket( very thick folded over several times) over the battery and stock filter box so I can lay on it while I take the Valve cover bolts out. Be careful of the towel in the stock box for the sensor in that box. They are fragile. I am short so please laugh and work with me at the same time.
Unbolt the 42 pin electrical connector on top of the valve cover. If you have an air compressor, now is the time to blow any debris around the valve cover down out of the way.
Take a PICTURE or take note which fasteners are bolts and which ones are studs with a nut to mount something else to. You will want to put it back exactly as it was. Get the 13mm socket and a 13mm wrench.
DO NOT TAKE THE Positive Crankcase Vent or CrankCase Vent(CCV) DOGHOUSE OFF UNLESS YOU HAVE THE FOUR ORINGS TO RESEAL IT
4 Viton O-rings to reseal the Crank Case Vent cover
OR THE ORINGS WILL SWELL UP AND BE NO GOOD AND YOU WILL LEAK OIL ALL OVER THE PLACE UNTIL YOU GET THE NEW ORINGS.
Using the 13mm wrench carefully remove the bolt just above the CCV dog house and leave the CCV in place. You will not be able to use the socket with the CCV in the way. Now you can use that 13mm socket and take all the rest of the bolts out. The hardest one is on the rear of the cover and you can not see the bolt without a mirror. Don't worry about the mirror, just loosen it and place the bolts to the side. I use a 5 gallon pail to put my fastners in. Slow down when you get the bolts loose and keep a tight grip on them unless you like fishing for metal in the pit of hell. I put a tarp under the truck for items I drop to easily find them.
When you pull the cover loose, be slow and easy so you don't put any debris in the VC area. If your harness connection is loose, very gently push the connector towards the top of the VC gasket and let the clips clip UPWARD into place. You could also unclip it and inspect for burnt connectors. Place the connector back firmly in place. Now take the quarter that you have shaved off right at the top of the hair line on the head and slide it in round side down and flat, cut side toward the TOP of the valve cover. DO NOT FORCE ANYTHING unless you have a fresh Benjamin Franklin laying around to spend on a new gasket/harness.
The clips should be clipped fully in and pushing up whilist the quarter holds the clips up. The flat spot gives the valve cover enough room to be installed and keeps the quarter from going anywhere.
If you want to you can now check the torque on the:
Lower injector hold down bolts at 120 INCH lbs.
Rocker arm bolts at 20 Foot lbs
Valve cover bolts when reinstalled will be 96 INCH lbs.
Verify all of the injector connectors are secured and clipped
Verify all of the glow plug wires are tight.
Do everything in the reverse order to put it all back together. Wipe the oil coated pipes down to remove any excess oil and start on the passenger side
Remove the intercooler pipe. You will figure out that you have to move it above the turbo to get it out. Lots of room above that turbo. I loosened my boost pressure gauge and tied it back with string or a small bungee.
Bungee cord the two heater pipes toward the passenger side fender. I put the Moving blanket on this side but did not lean on the A/C pipes. Same thing on this side except you have a bolt holding down the Engine Oil Dipstick so be careful with the dipstick. Only pull the dipstick high enough to remove it from the stud. The bolt near the AC compressor is tight but you can get to it with a few extensions and a deep socket. Same one as the oil dipstick. Note the stud positions again. Don't loose the heater hose clips because they are 28$ at the dealer. Loosen and remove the rest of the bolt/studs. Same thing as the driver's side from here.
Man, that is a lot of typing. Talking thru it is much less time consuming. LOL. Put a wrench in your hands and get to work. The sooner you get it done, the sooner you can drink that favorite cold beverage and relax that another inexpensive mod is done and you will feel better for not spending any money at the mechanic shop or Stealership It might even run much better or have gained some power back. Same torque values as mentioned above. Be careful whilist VC's are open. If it rains you need to shut the hood all the way immediately after you remove the blanket and slowly slip the VC in place. I hope this helps and is not too mundane. I prefer air tools but you need to put it back together with regular rachet/wrench and get torque values correct.
Dwayne

 

Thank you for the input,

From the sounds of it, thats probably where I am going to find the problem. It is good that you have already provided me with the solution. I could not view the video, so will have to try it again this evening. After reading the directions, it sounds like your advice is going have saved me alot of time and effort.

Thanks again

 

How do you know that one bank is not working? If you have codes stored showning one side is not working, that tells me you have a GPCM (Glow Plug Control Module), not a relay. If thats the case then more then likely you have an issue with the GPCM or one of the plugs that go into it.

Before you go pulling a valve cover I would inspect the GPCM.

 

And FYI... I have NEVER done the "50 cent" mod... I have also never had a UVC come unplugged.

But thats just in 1.5 million miles of driving...

 

Yup, saw one bank was out and my first thought was GPCM too.

Joe, you're a lucky man. I had to do my Ex when it was just over 100k miles.

Renee was driving down the freeway and called me, saying she had no power and could barely keep going down the freeway...said it was like she was running out of fuel. Luckily she was close to my mom's house so she pulled off the freeway and I swapped vehicles with her at my moms.

I ended up buying the clips Ford sells and fixing the one side and doing preventive maintenance on the other.

Stewart

 

Lucky? or do others just have bad luck?

I've worked on alot of truck over the years, and of all of them with an issue, only one had the plug unplugged inside the valve cover, and that was because some jackhat before me broke the clip and just left it in there.

New updated harness and he was back on the road.

 

Either way, you've been fortunate.

I just hope you didn't jinx yourself.

Stewart

 

LOL...

I carry with me an IPR, CPS, ICP sensor, UVC harness, UVC gasket, Injector O rings, Serp belt, mis plugs, fuel pump, fuel filters, oil filter, 2 gallons of oil...

I've got enough tools in the truck to tear down to the heads removed...

Not worried...LOL

 

Uh huh. Watch, now you're gonna get stranded on the side of 99 just outside of Bakersfield on a 100+ degree day....swapping out a UVC harness.

Stewart

 

Na, I'll just hammer down with the other side... My right bank has more HP then your entire motor...LOL

 

Oh here we go....

Don't forget now, I have that vaunted, incredible, Cosmic Cube-like power producing 38R!

Stewart

 

Thanks for all the input, yes I do have four seperate codes on the reader one for each glow plug. So, i'm going locate and and inspect the GPCM connections first.