The 175/146's (175/0's) are remans. I checked torque last week when I did the compression test - all were just shy of 120 in-lbs. I got about 1/8 turn on all of them to get back to 120 in-lbs.

 

Out of curiosity this morning, I did a CCT test. I didn't really expect to find any useful info from it, as the truck runs great and doesn't ever smoke when warm. It didn't turn up anything, except that Rich (Tugly) may be interested in knowing that EOT doesn't need to be over 156F with the 12.0 version of AE. I was at 145F and was pulling CCT numbers. If it will pull CCT numbers when EOT is cold - tomorrow morning - maybe I can get a little more useful input. My average PerDels in cylinder order 1-8 were .5, 1, 3, 0, 0, 0, 0, 2.4. I'm running a CPS replaced by Ford under the recall.

When Cody was here, he noticed that the #1 exhaust was MUCH cooler to the touch compared to any other cylinder, including #2 on the front driver's side. If I can read PerDels when cold, it'll be interesting to see what #1 is compared to the rest.

Without much else to go on, I'm gonna dive in to the passenger VC tomorrow and take a look. I'll probably swap injectors 1 and 3 and see what happens with both CCT numbers, and the exhaust temps.

Can one of you guys compare the temp (by hand) of exhaust manifolds right up against #1 cylinder (front passenger) and #2 cylinder (front driver) during a cold start and tell me if your #1 warms up notably slower?

One of these years, I'm going to get to the bottom of this.

 

Without an OEM black sensor, I wouldn't put much stock in the numbers on cylinders 3 and 8. I suspect the numbers won't change by swapping the injectors around, but I guess it couldn't hurt to give it a shot.

 

Yeah, I'm not concerned about the numbers on 3 or 8, I know that's normal. I'm more focused on the cold #1 exhaust after startup. I can't see that being typical, though the fan does blow across it. But really, that sucker is cold compared to the exhaust off #2, on the front of the drivers side. If I can get someone else to confirm that their #1 and #2 exhausts feel (by touch) that they warm up relatively the same, that would be a help. If that's the case, and I swap injectors 1 and 3, and the coolness remains with the #1 cylinder, then I've eliminated the injector as the culprit.

I should really rename this thread, as it's going to suck people down a rabbit hole that ultimately wasn't tuning-related. But it's a good troubleshooting read.

 

OK. When I took readings with an IR thermometer a while back, I don't remember much difference between 1 & 2. Number #5 was stone cold, but I know that injector is a problem on my truck. I don't recall if you've run a compression test or not. Have you?

 

Yep, and I'm good - got 340psi-350psi across all 8. Adjusting for 4800' altitude, that's about 400psi.

 

Well, Pikachu just enlightened me via PM. I can pull the electrical connection to the #1 injector and do a cold start. I'll have a miss, but if it no longer smokes, it's the injector. Brilliant.

If that doesn't solve it, I can keep eliminating (only) one injector at a time, and see if I can track down a single injector as the problem child. But, given the cool exhaust on #1, I'm guessing (hoping) that's the culprit.

 

Update for all - I got into the VC's today. Just for sanity's sake, I tested each glow plug cap back to the GPR post - all were at .2-.3 ohms. I checked both oil rail plugs on each side. I rechecked injector torque. Everything is golden in there.

I unplugged injector 1 and fired it up, ran it about 20 seconds - still plenty of white smoke. I plugged it back in, then repeated the process for injectors 2-8. No change in the cold start smoke. So, we can say that no single injector is responsible for the smoke.

I checked the armature plate to poppet body clearance on the #1 injector - spot on .004". I didn't bother checking the others.

So, next I'll investigate the fuel pressure side of things - next weekend. Tomorrow I get to investigate why the hell my not-so-cheap, 5-year-old Amana refrigerator is ice cold in the freezer, but 60 degrees in the fridge. Either a bad defrost timer or defrost thermostat. At least I feel a little more confident testing those items. Did you guys know there are appliance repair forums??!!

 

Dang it anyway. Back to square one with the smoke issue.

Dan just rolled out of the driveway.

 

I'm hoping Dan left happy.

 

He and I met at the wind farm above Vantage, to compare handling characteristics of our trucks. What does Dan have attached to his PCM now?

 

He left with a better understanding of tuning......

He also left with what he had initially. He didn't have his Hydra and I can't do anything with the F6.

 

Dan rolled into Cody's place rather later...and it was raining, and dark. So Cody and I BS'd for the better part of 2 hours and I rolled into Billings. 10am here in Dickinson right now. Getting a coffee.

Still have the F6 attached.

 

Yeah...my late start from Kittitas proved to be a greater loss than I could have imagined.

I met up with Rich right here, and was working dogs behind it in the hills.