another perspective 7.3 issues

[Clint]

Working with a couple folks over on dieselstop, figured I would post up here and see if Im heading the right direction.

truck left me stranded coming home from the Rubicon in Green river. got it towed home (thanks bluexj and clemsonkrawler),

Had the codes ran on the truck, and found out the ICP sensor was bad (oil leaking past it and into the pigtail), as well as low contribution error on cyl 2 and 4 on the driver side. replaced the drive side valve cover gasket as well as the harness.

Truck is still running like crap. A miss at idle and NO power when moving the truck. found a bunch of oil in the coolant, which I was told was oil cooler problem. Just got done replacing o rings and gaskets and bolting it back in. I will be flushing the system after I figure out what the rest of the problem is, dont see any point of doing right at this minute.

Was told to check the wiring from the IDM to the valve cover, and the wire on pin41 as it can chafe through. If that checks out, then next thing is replace the IDM.

Any other things to check before I blow a bunch of money on the IDM?

[bluexj]

Wish I had some advice for you. I hope you figure it out soon.

[Big Dave]

Any funny smoke or anything? I would think the oil in the coolant would be a bigger deal than just an oil cooler.

[vb]

cavitation in cyl walls?

[Clint]

Any funny smoke or anything? I would think the oil in the coolant would be a bigger deal than just an oil cooler.

white smoke when it starts


cavitation in cyl walls?


Wouldnt think so, 140k on the motor, been well maintained. Dont think the later 7.3s had that problem did they? I checked the SCA level of the coolant at 100k and it was fine

[Big Dave]

Is the passenger side valve cover harness in good shape? Probably not a fix-all, but might help some of it. The extra vibration from running rough could've acclerated the process on that harness.

[Clint]

Is the passenger side valve cover harness in good shape? Probably not a fix-all, but might help some of it. The extra vibration from running rough could've acclerated the process on that harness.

No clue, havent pulled it apart since the contribution error was on the driver side.

[pitbull]

Clint,

do you have and IR gun???
Shoot the passenger side I had both of my harenesses fail at differnt times but both showed a huge temp diff. (colder) when they went bad...
good luck...

Joe

[Clint]

Clint,

do you have and IR gun???
Shoot the passenger side I had both of my harenesses fail at differnt times but both showed a huge temp diff. (colder) when they went bad...
good luck...

Joe

I do. I can do that, truck will have to idle to warm up, it has no power and the miss gets huge if I try and drive it.

[Clint]

Another thing I havent ruled out is a head gasket problem.

[Big Dave]

Another thing I havent ruled out is a head gasket problem.

That was my fear with the oil in the coolant.

[Clint]

That was my fear with the oil in the coolant.

From what I understand, a head gasket would put coolant in the oil though right? As of right now, there is none.

[dmeis]

It depends on how the head gasket "blows". Mine had no oil in the coolant and no coolant in the oil. The coolant system got pressurized by the combustion chamber and was low on power and blew white smoke.

[Clint]

Swapped out the IDM with another and no change. Rebuilt oil cooler, found a few bubbles of water in the oil now. Hard to tell if its from the oil cooler rebuild, but I doubt it, everything was dry when I did the work.

Really thinking head gasket. If thats the case, Im going to pull the motor and do both and a couple other things I want to do. still need to check some of the wiring just for fun, but im really thinking head gasket. As the truck warms up it gets worse and white smoke all the time.

[AMXROCKRIG]

www.fordcummins.com :thumbsup::beer: