Hello, appreciate any advice. Good or bad
I bought a 97 F350 Diesel. Just under 200k miles. Drove it about 700 miles. Ran well. Actually got 19mpg when I was driving 60ish on one of the tanks. 411's and tiny tires... Anyways. Got it home and wanted to massively upgrade it. My mistake was trying to knock it all out before a long trip we planned in a couple of weeks. So, new downpipes (it was stock), New up pipes, New injectors, new glow plugs, New Martys fuel system, New stainless injector cups, All new hoses, belts, lines, some vacuum stuff repaired etc etc etc.
Well fired it up (hard to start) and it ran rough at idle. Runs rough at 2000 rpm too. Missing like one cylinder is down maybe 2. Smoked like a chimney. Haven't even tried to drive down the road. Acting like it is running on 6 or 7 cylinders. Ran it for about 1/2 hour to clean up the smoke and oil residue in the pipes and see if it would clear up. Also, to check the whole new coolant system - radiator, water pump, heater core.....
So, I thought after trying it a few times over several days. I thought I must have screwed up the install on the injector cups. First time doing those.
My dilemma. I am not sure the injector cups are an issue. I got a pressure test on the coolant system. It is holding fine at 15psi for the last 1/2 hour or so. Cold engine but still.
I am thinking that would indicate the injector cups are not leaking coolant at least. Maybe they could be leaking still? Would that rule out injector cups?


Next I have the compression test.
Cyl 7 was the lowest 295PSI cold. I put oil in it and it bumped to 340 PSI C. But, I also have an issue threading in the hose as I can get maybe one thread on it. Seems a bit buggared up.
Cyl 5 340 PSI cold
Cyl 3 340PSI cold
Cyl 1 320 PSI cold

Cyl 8 315 PSI Cold had a little oil on the tip of the pressure hose.
Cyl 6 310 PSI Cold
Cyl 4 310 PSI Cold
Cyl 2 340 PSI Cold

I recognize these are not stellar numbers. 7 is mostly my concern as the others are within 10%.

With this data what would you suggest to proceed?

Try to rule out a bad injector?
I also got a new PCM (was very rusted - had a water leak from the windshield directly onto the casing and into the board - and Tunes for the new injectors. 180/30.

I am not sure if I should buy a single injector and swap out what I think might be a bad one (by disconnecting it) Haven't tried it.

Should I replace the cups on cylinder 7?

Adding oil to cylinder 7 would suggest bad rings when it popped back up to 340PSI; but, I had a heck of a time threading in the hose. Just didn't want to start.

Any advice before I start drinking and throwing chit would be wonderful...

Would Cyl 7 also possibly be bad seal on the new injector? Adding oil bumped it. You thing that could account for it?

Thanks for the advice.

 

It's of course gotta be something new if it ran fine before. If 7 is the cylinder missing I'd pull that injector and inspect everything. If everything looks ok I'd swap it with another cylinder and see if the miss follows. What brand of injectors?

 

Thanks. Yes. Ran it today and I'm guessing it is one cylinder missing. Pulled the injector harness on each one and didn't find the difference. I'm getting some oil out of the up pipe @ the exhaust manifold connection at cylinder 7. I tried to fire up my old old pc and it swallowed its ***. Gave me no hard drive. Had a autoenginuity program on there. I have a newer pc and it is playing hard to get. Won't let me get on the internet to download the program and try to run some diagnostics. I'm mostly apple. So, got this pc just for scan tools on the vehicles. Going through the update process to see if that will allow me to get online and load the program. If so, great. If not, I'll have to see what I can use on the apple to run buzz tests.
I do have a new ribbon for the cpu to the hydra chip. The old ribbon got scrapped on install. Hoping that isn't the issue. But, I'm going to pull the new cpu and put the new ribbon on.
I'm going to check the valve cover harness too. I replaced 3 out of 4 of them due to just being bad or broken pieces. I need to double check I didn't wire one of the grounds to the wrong injector. It is a possibility...
Other than that... I just don't know. I'll update as I can get some work done.
I'm getting a roll off dumpster to do some yard cleanup on Tuesday so that will consume a good deal of time.

 

Oh, sorry. Full force stage 1.5 180/30% legacy injectors. Nothing crazy just wanted a little extra pop. If I can get the bugs worked out I'm looking to get the new KC turbo generation stage 1 turbo kit. Sucks I have to replace the up pipes again. These suckers are brand new.... And I had to pull the cab to get them to fit. rrrrrrr.

 

Are you able to determine if injector cups are leaking by pressuring the coolant system without pulling the injectors?
it seems to me if they are leaking with injectors in there it would show.
i pressured the system to 15# for 2 hours and had no loss with the injectors still installed.

 

I’m thinking maybe the one injector that had oil on the glow plug is leaking oil. I was down a little oil. I might pull that one and a few others to check. Hopefully….

 

injectors installed or not wont matter in the test as the collant is around the cups

Pull the push rods on 7 and see if bent?

ohm out harness with this
https://www.ford-trucks.com/forums/1...load-test.html

 

Thanks for the reply. When I get a chance I might just do the pushrod check. I did find 7 injector leaking past the copper crush sleeve and seals. I replaced those but; Just got really bad news. So, buttoned it up. I'm dealing with that. Might be a while...

 

[img alt="What's the verdict?
Looks to be with about 1 hour of total run time it was leaking past the crush washer.
Anybody disagree? Am i on the right track?"]https://cimg5.ibsrv.net/gimg/www.ford-trucks.com-vbulletin/1500x2000/img_9146_6bff99f74a1ae3a7a9b37673b691dc4c9a08606d. jpeg[/img]
What's the verdict? Looks to be with about 1 hour of total run time it was leaking past the crush washer. Anybody disagree? Am i on the right track?

Looks like compression gases past the seal to me.


This is the injector that was the lowest compression with oil residue on the glow plug. I thought the injector might not have been sealing. I pulled it and resealed it. Seems a tad better. I think I have several like this. Still hard start, missing and smoking. Also, has oil leaking out of the exhaust. So I'm thinking either piston rings ( I am doubting it) or the injector seals are bad on several injectors. Had a serious back fire when I used starting fluid after changing the original injectors. My stupid self was working on it while I was sick and didn't think to disconnect the glow plug circuit. So, now trying to keep busy and this is helping.... I guess.

 

[img alt="What's the verdict?
Looks to be with about 1 hour of total run time it was leaking past the crush washer.
Anybody disagree? Am i on the right track?"]https://cimg5.ibsrv.net/gimg/www.ford-trucks.com-vbulletin/1500x2000/img_9146_6bff99f74a1ae3a7a9b37673b691dc4c9a08606d. jpeg[/img]
What's the verdict? Looks to be with about 1 hour of total run time it was leaking past the crush washer. Anybody disagree? Am i on the right track?

 

This is the crush washer.

 

injector not tight enough and made the orings wear is my guess

What did you torgue it too?

 

10ft#. Think he backfire might have had something to do with it.

 

10 is good. Hope its calibrated that low mine was off a lot and had several loose ones.

"Adding oil to cylinder 7 would suggest bad rings when it popped back up to 340PSI"

Not always, there is a bowl in the piston that might get filled to confuses things. Leak down test can tell more but not if the GP threads are buggered up

 

It is a very old torque wrench.
So this time I'm running it to just over 10ftlbs.
It is massively tighter. About 2-3 full turns tighter.
7 - definitely had a bad seal.
I'm going through them all and putting new seals on them.
Passenger side is done.
Hopefully in next few days i can do the drivers.
Pull the gp, spit out the oil, do a compression test since I'm there. And check to see what is what.