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Yep you love your trucks then spend the bucks, Optilube my go to. Frank if I bought all those chemicals here in my county they would raid me looking for a Meth lab.

I too use the Optilube in all the diesels. I also did a super dose of Chevrons Techron for diesels in my GMC 3500.

Just going through the tm's and found this again minimum 0.023. Trying to understand why some fuel control unit assembly's are sticking after install if everything else is not sticking. We know why they are sticking because of the varnish stain / crud in fuel. Now that would be the fuel control...

Oil good fire bad. If you can get it running I like the LDS troubleshooting manual. Seems like most of the time it's said to check pressures at the bleed screw. That might be a nice place to start if she will run.

Yep now that your FDC is bypassed the droop screw does not act the same because the FDC wedge plate is no longer moving. Now every change comes through the twin nut main fuel adjustment. If you did change the setting on the droop now you are just changing where the main is set to. Did you read...