I am working on CL project truck today. 60 degrees and sunny so I am liking it so far. I still have to check drivers side but ran into question while torquing items under the vc.

The truck was giving #7 injector hi/lo code. The harness was slightly cocked so that may have contributed to it. Put the .25 mod into that side and checked all the resistances to GP and Injectors. All the GP pass side came in at .6 ohms. All the injectors varied between 4.7-5.2 ohms. I have .2 ohms measured when I just touch the leads of meter together so I am considering all the solenoids seem to be working.

Now i think the numbering is 1357 front to back on passenger side. I still have to check the drivers side and I do not have any of the diagnostic equipment with me today but I have a slight miss with stinky fuel/oil smoke at idle.

When i unplug each injector for redneck injector cutout, I get a change on cylinders 157 but not 3. No change in the way the truck runs. The solenoid is checking good and i swapped solenoid 1 with solenoid 3 and still no change. I am hard of hearing and even had my wife listen who has gotten pretty good at that type stuff and she said no change as well in the way sounded. I unplugged the ones that worked first and then the one that does not so she had 3 others to compare it too

I am thinking probably bad injector #3. Either not firing or dribbling all the time. When I ran cyl cont test earlier this week, i had fault for #8 with black cps and perdels on it was 10 %. Does all that sound right to those that have been into these more?

 

I just did Drivers side vc which led to another question.

All the glow plugs on that side were .2-.4 which is lower than i expected. Is that needing replacement?

Harness was loose on that side so it got another .25 mod. All the injectors on both sides seem to be oiling the same and no oil out the top lower oil on any of them. #8 injector is different than the rest so I assume it has been replace due to the cyl con fault that it reads. I reveed it up and then went back and did redneck inj cut out at idle and got a little change in 3 and 8 which was acting the same earlier so maybe that is part of how it works.

Here I have some questions. My fuel filter is still the original motorcraft white that it was when I put it in 350 miles ago when I took the yucky fuel out. But could I have an injector o ring issue without it getting dirty or have i confused something there? I have a little oil in the intake of the turbo and to the cold side output. Enough to make a small dime size puddle on both or maybe slightly smaller. Turbo play is good. Intake fins are little sharp but not too bad.

 

What I'd do on the #3 injector is put a cold drift punch on it (not the solenoid) and tap it with a light hammer while running. The idea is to break loose whatever may be causing it to stick without perfing an o-ring or cracking a cup. Now, be aware this is possibly very, very bad advice, and the more knowledgable guys who just shouted at their computers will no doubt reply soon.

You obviously know what you are doing, so please understand I do not intend to be condescending or rude. But a few things seem to be in question so I wanted to address them:

The cylinder numbering is indeed typical Ford; from the front 1357 passenger side and 2468 driver side. Chebby just plain got that wrong.

#8 is different from the other 7 injectors to help reduce the cackle at that position caused by the "dead head" fuel system. Perdels shows that difference, and often the SES code it sets resuts in needless injector replacement. 10% contribution variance ain't good, but swapping in a different CPS might change that.

The dime size oil puddle is normal. The crankcase vents into the intake and the vapors collect and seep out around boots etc. You could do the CCV mod to re-route the vapors and so keep the place clean, but for me here in the Peoples Democratic Republic of Kalifornia it is verboten.

If the GPs were really a problem you'd certainly know it on a cold start. More than a fuel smell anyhow. If it starts normally I'd say there is no GP problem to fix.

Here's a few questions for you: Did you ohm theGPs again after the 50 cent mod? See any evidence of melting or burns on the connectors/pins? Do you have the federal GP solenoid ot the CA style GP module?

Good time to look for/prevent chafing where the harness rests on the VC near the 42 pin connector. IIRC some GP issues start there.

Sounds like a great day to me! I'll go crack a cold one in your honor.

 

It will crank without plugging it at 25 degrees as we had that last week. It does not crank as good as my 2000 does. It spins faster but I have been suspecting the 2000 is ready for a starter. Hpop is full b/c i checked it before cold starting last week. GPR has the same output voltage as input at 11.6. I do have to cycle the glow plugs a couple times. I am thinking with the cold start, miss , and smoke issue that maybe its as simple as injector o rings. Does that sound reasonable to anyone else? The miss is only at idle. No noticeable miss accelerating. I put the vc back in place with 2 bolts each as I am expecting rain and had to do it outside but if that sounds reasonable than I think I will place an order from Clay and leave it apart until friday.

I pulled the exhaust side of the turbo. I found the clamp harder to do than anything else I did today. There was no oil in that side; just a little soot. I pulled it b/c I saw oil on the bottom of the lever for ebpv so that made me wonder was it as simple as the turbo again.

It is the fed emission package David. I did not ohm the injectors/ solenoids until after doing the 50 cent mod. I was getting the intermittent #7 hi/lo solenoid code so i figured I need to check it. I did look at all the pins on both the male and female sides and all looked good. I also cleaned them well with contact cleaner b4 reinstalling.

I work on a lot of cat c7 engines which are similar but different and really not had to much to my 2000. Thanks for answering the questions I wanted to verify. I read a lot of the injector posts but rarely comment as I have not has that much experience w/ 7.3.

 

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