Jack the truck up and put it on blocks(a lift is even better).
Get an "undercoating" gun from horrible freight.
Spray the underside liberally with used motor oil.
It keeps most stuff lubed and really cuts down on the effect of road salts!
Its even easier if you have a 5ton wrecker. Maybe its time to shop for another vehicle...
just sayin.
I have fluid film all over the place. I like that stuff a lot. That is what it is made for. It creeps. I have some sheet metal to fix now. But that us what I do for work now.
I think in the long run, given the low miles, a V-8 gasser is what I would like to do. I see some pretty neat motors in JEGS, Summit etc. I will always look at Craigs list, but that is a gamble with people. I also need to make sure I can swing it financially. My dreams often outweigh my bank account.
I have another thing that might be the culprit. The previous owner bypassed the stock fuel pump. There is an electric pump down on the fender skirt. This just occurred to me while compression testing. I had better return everything to original. It was handy to disconnect while trouble shooting. But leaving it off starves the IP after a call for power and it shows. I will fix that. The new injectors showed up. So did an absolute pile of snow. I am off to plow, then I can have my day back.
Ken, The mountain pass was 4th of July pass in North Central Idaho near the silver valley mining region. It is steep, long and it was hot outside. I made the summit doing 10MPH and fast approaching 230 degrees. Another 300 feet and I would have had to pull over and cool things down. I crested the summit pretty much projectile sweating at that point, and it cooled and picked up speed. I don't know that altitude but can look it up later. The towing load was a 4200 LB Jeep CJ on a 1000 lb trailer. I do understand I was asking a lot from the 6.2. I did not understand this when I bought the truck. I like the truck. Changing everything may not be the best thing to do to it. But I need to tow once in a while. I'll make sure the 6.2 is doing it's best. But I believe I have found it's limitations.
I had better get to plowing. There is supposed to be more coming.