2002 Ford E450 7.3l Power loss, no smoke or fluid leak ?? :(

[M@tt]

Weirdest thing to my mind, after what i just “fixed”

All the passenger bank is ohming out perfectly at 2,8/2,9ohms.

And for some reason my entire drivers side bank ohms “open” .. full on open

Going to unplug uvch and test both valve cover and the pig tail connector to the 42 pin figure out where the issue is.

The adventure goes on ! ;)

[joeblack5]

Impressive adventure. After all this you will know the 7.3 better then any paid expert.
Good luck

[M@tt]

Dude .. ^^’

Thanks for the compliment.

And roach, thanks for sharing your rat slaughter

I’ll have news to share tomorrow after a gooooood night of sleep.

Cheers !!

[M@tt]

Finally found a temporary fix to my P1316 before probably needing to replace the uvch inner harness if not the gasket as well.

Here is whats up, after re-opening drivers valve cover for the 3rd or 4time, decided to go in for deep inspection.

Cleansing the connector and replugging with just what i needed of contact grease on the center pin was not enough.

So back to testing it, and figures out that i have a perfect connection where the plug is fully in, clipped. But even with my wonderful penny to hold the clip, realized it just needs to unplug perfectly of 1mm, still being nicely clipped on, and it looses all connection with the 1 high voltage line that runs through all 4 injectors ..

So before spending good money at ford for new harness and gasket, tried my last cheep fix.

Clipped those in tight, and let a couple drops of super glue run along the connector junction. Sips right in with the oil left there. Waited 20/30 minutes to put everything back together, was worried about the glue ethyl degas.

So far, its been twenty four hours since we are back on the road, and it seems pretty stable so far.

Will keep in touch about that ;)

Happy adventures to all of you !

[cadillackid]

The glue will get you down the road awhile but the thing I’ve found with super glue is that repeated wide hot cold cycles and it fails, I’m assuming you glued the uvch side and not the harness external side.. I have no idea how super glue lasts in oil. I’d plan to still replace those parts and count the glue as a good temp fix to make the wheels spin for awhile

[Jocelyn]

Glad you got running again! Even if the glue fails you'll know that the connector is the issue, and that's really valuable info.

[E450Shorty]

Originally Posted by M@tt

Is there a way someone might be able to explain how ICP, IPR, PCM, and IDM relate and fonction together ??

missed this comment...
ICP is the injection control pressure that is what drives the injectors.
IPR is the injection pressure regulator. The HPOP (high pressure oil pump) is a fixed displacement pump that generates the desired pressure based on what % the IPR valve is open.
The IDM (injector drive module) drives the injectors. it is basically takes 12 volts from the battery and boosts the voltage to 120 volts (or so depending on the version)
The PCM tells everything what to do.

Hopefully that helps.

[M@tt]

Information always helpful !!

So ICP checks the injectors pressure, while IPR is the oil pressure sensor telling PCM & IDM how to fire/drive the injectors, correct ??
Trying to picture a functional “diagram” in my head

Thanks for brainstorming !

[M@tt]

Originally Posted by cadillackid

The glue will get you down the road awhile but the thing I’ve found with super glue is that repeated wide hot cold cycles and it fails, I’m assuming you glued the uvch side and not the harness external side.. I have no idea how super glue lasts in oil. I’d plan to still replace those parts and count the glue as a good temp fix to make the wheels spin for awhile

Your experience with super glue : highly appreciated !! Thanks !

Since i’ve only dropped literally 6 drops of SGlue around the inner uvch connection, next test phase will be to squirt it nicely to seal that stuff inside out ! When THAT comes appart (which i kind of doubt), then i’ll invest those 200$ per valve cover.

To bad Dorman’s electronics dont meet the precision qualifications to have my money .. :/

[E450Shorty]

Originally Posted by M@tt

Information always helpful !!

So ICP checks the injectors pressure, while IPR is the oil pressure sensor telling PCM & IDM how to fire/drive the injectors, correct ??
Trying to picture a functional “diagram” in my head

Thanks for brainstorming !

Almost. The ICP is how much pressure the injectors are seeing from the high pressure oil pump. The IPR isnt a sensor but a regulator valve that moves back and forth to allow oil to go into the oil rail for the injectors.
So a flow chart in order of what is needed...
PCM -> IDM ->ICP -> IPR and repeat.

This video may be helpful. It's a 3 part series.