Fuel lines and ICP sensor will have no effect on your problem.

You can just unplug ICP sensor to rule that out. If truck runs different with sensor unplugged, it’s bad.

Has anyone mentioned looking at oil diverters with engine running or swapping the (apparently) offending injector into another hole to see if problem follows the injector?

Depending on what fluid(s) were in your stored injector and how it was stored, it may not have had a good shelf life.

You can always contact the injector builder and ask them for advice.

Meanwhile, what codes do you get after KOEO, KOER, CCT, Buzz Test and what are Perdels? Your time is better invested here than fuel lines as far as finding a cause for your issue...

 

There are no codes, the buzz test passes.

 

i always say if you have nothing positive to say or add to the conversation at hand! STFU!

Back on topic, I am interested in seeing your results seems your fixing others vehicles when yours needs love , LOL the story of my life!
I do alot of remodels, wife likes to decide she wants something done when i am the busiest!

Also would like to say that Although i have not had the pleasure to meet with any of the FTE members , i do however look forward to it one day! I consider these guys here very helpful in all they have tried to do, help and yes even seen some close to other members run on over to help out! Now that's a great community!

Have great day !

 

Those are not Perdels we expect from a balanced set of injectors.

Are #2 and 7 repeat offenders with higher % or do you see the numbers bounce around after driving?

 

For those following along and not knowing what a PERDEL is or can indicate, the link below taken from the 7.3L PSD Tech Folder should help bring the subject to light.

• CCT, CRV and PERDEL Explained

 

They bounce around. #1 is the knocker, I feel like it’s a wrist pin or piston skirt. I guess I can swap the new injector in #1 with 3 or 5. I just have a hard time believing two injectors make the identical sound.

 

They would if it was fuel or high pressure oil causing the issue. Aeration of the fuel or oil will cause knocking. Go ahead ask me how I know. It also causes erratic PERDES's on multiple cylinders. My personal experience it's been more difficult to narrow it down to a single cylinder like you're seeing but I also have a through flow fuel setup so that may be the difference. You could have bad injectors you could have aeration it could even be a sloppy wristpin or rings, but in my experience pistons don't stop bouncing around in cylinder bores just because you unplug an injector.

 

First thing I'd do is run the test again to see if the results are reasonably consistent. Not necessarily the same numbers, just the same pattern.

PERDELs for 7 is oddly high. If you're open to another dive under the VCs I think I'd try moving injector 5 to 1 hole, move 7 to 5 hole, move 1 to 7 hole. That puts your "best" injector in the problem hole and the oddly "bad" 7 into the best hole.

The whole set is atypical tho. Don't recall seeing 2 better than 8. The worst % is almost always 8. Also bear in mind the PERDELs just shows change in contribution, and we don't know if that change is more or less acceleration. Just shows % out of balance.

Agreed with udsuth, could still be a fuel supply issue. Helps explain the weirdness of the whole set.

 

The shipping confirmation updated today and I supposed to get my fuel lines Thursday. Providing I get to work on my truck Saturday I will replace fuel lines and then drive it long enough to get it good and warm then look at perdels again. Then move to swapping injectors around again. If nothing there drain oil and look around with the bore scope.

 

Well I took a stroll down memory lane just now and noticed in post #23 you said you ran a cct and it failed #2, #3, and #7. Next in post #44 is fuel pressure test of 80 psi at idle. Then today in post #47 is a screen shot of the PERDEL's showing #2 and #7 out of sync by around 5%. So I see 2 instances of #2 and #7 not lined up with the pack, which happen to be where the fuel is being fed to each head. You have a knock present at #1 which is the dead end for the fuel in that head in the factory system, and fuel pressure readings that are out of spec. Personally I don't know much about the injectors internals to begin to comment on what could or couldn't happen as a result of over pressuring the fuel side or where the actual "line in the sand" might be for it to be problematic. I do know that you can't throw a rock on the site and not hit a thread where the Hutch mod isn't suggested, which includes replacing the lines between the tank and fuel pump because they are crap and known failure points in the factory system. So some simple things I would consider might be running a hose from a fuel can to the pump and run the truck. Does it help or not . Run the feed or return sides into a bucket and see what your getting. Is there good steady flow, any water or excessive air bubbles. Could also pull the fuel regulator to see why the pressure is high. Some free or nearly so things to kill time till Thursday.

 

I haven’t seen a sloppy wrist pin or broken skirt on one of these engines yet.

I have heard fuel issues sound like banging hammers together.

 

Hell, I'm sure most of us have heard a gasser with timing advanced to much. Sounds like a hammer and anvil. The way I understand it, for diesels, fuel is the timing in a way.

 

post #59 I think

https://www.ford-trucks.com/forums/9...perduty-3.html

Don’t get me wrong, I would love for it to be a fuel problem.

 

Super rare failure mode for a 7.3.

I’ve bought a few trucks with ‘blown up’ engines that were not bad. Injector issues, bent pushrods, etc often lead people to think there is a catastrophic problem....

 

Fuel lines and plentium inserts came early today. I stayed after at the shop and replaced leaking fuel lines and added the inserts which space up the intake spider just enough to make the connection to the turbo a little rough. Noticed a new coolant leak has showed up for the party.

Fired up truck with no noticeable change, while waiting for engine to warm up I shut it off and ran another buzz test. Failed 1,3,5, 7. Jumped out and replaced the plug to the uvch. Fired truck back up and it ran way smoother than it has since this whole mess started, still knocking. By now it’s warm enough for perdels. Every cylinder is under 1 except for #8 which is at 2.25, and #3 is a 4.0.

I decide to drive it home to see if things will smooth out. Runs great at first, then the knock starts sounding funny and the pedal starts feeling like it’s moving away from me. Pretty soon I can’t maintain highway speed anymore, and now we’re costing.

pop the hood and coolant is everywhere. Idm code, two icp pressure codes, and p0340. Towed back to shop, good thing the rig I drove in this morning was still there. So... unsure at this moment where the truck stands, but I do know it’s testing my patience.