97 psd 128k, swapped the UVCH with another one and no workie, observed idle and have no oil coming out of the rear two passenger side when running. Also installed brand new IH grey CPS. Soon to swap injector positions to reaffirm both injectors to be bad. Peeled back the wire on the engine harness all the way to the GPR and seems to have the injector wires wrapped in aluminum foil ish stuff with the outer GPR wires visible. So might try the CRC injector in fuel bowl on next fire up as an effort to discernif it in fact is wiring or injector concern. Is there anything like bad IDM or even ICP that would be in consideration? Thank-Q this truck is a parts truck and playing with the motor to make sure i know what it is before I take it out. Thankx again everyone and much appreciated by me.

 

Could be a bad injector solenoid, burnt pins on the valve cover gasket, a wiring issue or IDM issue. Let us know what you find with the injector swap around.

 

i looked at all the pins , everything is good, does have white smoke out the exhaust. Would it be that the fuel is still being pumped through the injector? I'm

 

Pull the solenoids off & see if the poppet screws are loose ...

How old is the motor oil ?...

 

it looks pretty thin, oil is black. Am looking at the IDM swap as I have a 01 psd as well. Notice the IDM pinout has pin 24 as the fuel injector feed (right) for the # 5 & 7. Also see that there are pins 8 for #5 and pin20 for #7. Might try a KOEO test to see if there is contunity. Happen to have an extra 97 engine harness as well............ anything other than injectors would be good news as i already have these parts laying around. When this is up and running am going to change the hpop side oil as well as the bottom end. Thanx again for the concern

 

Ummm.... Please don't say that ever again.


Definitely swap injectors too see if it's the injectors or wiring/computer.
Only guessing till that's done.

 

ahhhh the results.... swapped idm's with my other running psd, same thing , no oil coming out from the injectors while running. Interesting enough, with only 128k , of the two suspect injectors, one is a stamped R , and one original. Thats special, 128k and on the 3rd injector in #7 hole. DId peel back all the wiring a good 8 inches or more and found everything intact. Next cleaned the pins on the IDM harness connection and made sure the injector harness connections were all unplugged. Took a length of extra insulated wire and connected on end to the battery and the other end to the IDM harness for each specific circuit while using a test light on the injector harness end to check for continuity in each circuit. Everything is intact. Havent swapped positions yet as was running out of dayllght, although did notice the passenger side bank solenoids top screws all needed about 1/4 turn. And to think a few months ago I sold off an extra set of 8 AA injectors. That's okay, at least I know where I'm at

 

sigh...youve been watching the powerstroke help wizzard Bill Hewitt on youtube huh? If so, do yourself a favor and forget everything you got from those videos and start over.

The oil in your hpop resovoir will go back into the crank case and be replaced with the fresh oil as soon as it fires up. Dont waste your time changing it

 

thought id try to add some humor to the situation while in the struggle , makes the frustration of poor maintenance bearable

 

Been busy all week and have some results , altho dont have way to check codes yet, my scan tool disappeared with a former employee. Basically had no oil spitting from the #5 and #7 injectors. So have a friend with a parts motor and installed two known working good injectors with brand new o ring kits in the #5& #7. No change, went and then swapped good injectors ( that were obseved functioning properly) from #1 and #3 cylinders to the #5 & #7 locations. No change. Did a little research and had some time and spare parts, individually swapped idm, pcm, and injector harness, No change. There is an ever so slight amount of oil from the #7 now when running and nothing from #5 injector. Am thinking its in the wiring of the underhood between idm and pcm. Next to get another code reader. Thought for sure it was in the pigtail on the injector harness and it sure aint. Any help appreciated to get this psd up on all 8 cylinders is appreciated, Ron

 

UPDATE: Happen to notice extra under hood harness and while inspecting the cab connection. There is a wire that was spliced into back in the day and wouldn't ya know that it happens to be an easy to get to wire to crimp onto. Upon inspection did a little circuit testing and found this is the grey/red circuit 368 wire that feeds SIG RTN into the map sensor, trans range sensor, and engine oil temp sensor. I realize this frayed wire could be the cause. Unable to solder, then I crimped the blue round style. Upon start, do have both injectors firing, although not as frequent as the #1 & #3 hole, so the signal is still a little weak from the reconnect drop of the crimp style fasterner. Did also notice MAP sensor now has turbo boost at Idle. Seems like some oil coming up from #7 glow plug. Wondering if possible injector cup concern there. Still sound like some kind of rod knock, although i've heard that injectors can imitate a rod knock when not firing. It's progoress, altho nt done yet. Probably swap underhood harnesses next when it aint raining.

 

update on what is a now weak injector #5 & #7 , is spitting oil although at a much slower rate than #1 & #3.

 

Did you ever find the problem I got a 1999 f550 same problem 5 was dead bought reman inj put in it now it's pumping oil but when you unplug it can't even tell it was plugged up #7 Is about the same way i have ohmed everything out all the way to the icu it's all good even took hot wire and test light at icu plug all good only thing I have not done is compression check #5 is dead 7 hits very little when you unplug them just bought truck told it needed 2 inj has 302574 miles any help would be appreciated thanks Roger!

 

nice use of a dead thread...

You need to run that compresion check and ohm out the wiring connections from idm to those injectors. I have a feeling you have low comp. The 99s had a faulty air box design. You may have a dusted motor.

 

^^^ Dead thread plus wrong section. On the OBS, when it's two cylinders fed by the same UVCH connector, that connector is suspect. Obviously doesn't apply to the SDs. But what does apply to ALL engines, if you have two adjacent cylinders not firing / contributing, a head gasket blow between those two chambers is on the suspect list. And indeed, compression would be a factor.