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Very likely you will not get fuel gelling at 11* F while trying to start it cold. Your more likely to experience the gelling issue around 0*F or lower when your burning uncut fuel.
Doesnt diesel start to cloud at 32F, and gell between 10F and 15F? All I know was the truck stalled when pulling out of the driveway at 11F. Twice
The fuel temps on the return side would be my guess. As far as gelling, I have operated vehicles as low as 20 below zero and have never had a fuel issue.
I think I read something about the injection and lift pumps being cooled by the fuel? So I suppose the return line going to the tank is necessary to dump heat into the large volume of diesel.
Any chance there was a percentage of bio-diesel in the tank? I had some 10-15% bio diesel gell up on me around 15F once.
Might have been some 2 stroke oil that could do it
If your fuel gelled/waxed up when you pulled out of the driveway at 11* it would not have started a second time until that fuel was warmed back up or additives were mixed in. I think you most likely had air in the lines.
Not surprising then, these old steel lines had been on their way out for a while. I guess only recently the problem started to worsen.
Normally I would just go OEM and call it a day, but seeing how annoying the problem is when these fuel lines leak, I'm shooting for as much "over-engineer" as possible.
Do you see white smoke when this happens? Had this happen once and it turned out to be a bad injector pump. It was a LOT of white smoke and wouldn't rev high.
No smoke at all, revvs super easy. I've actually been trying to add resistance to the throttle because it's basically an on/off switch.
This is not something that you see and I learned a lesson now. That cracked diaphragm was only part of the issue. I replaced the injection pump with a rebuilt pump. The truck runs perfect now. I know a lot of dancing and songs are played to avoid getting the injection pump rebuilt but in the end it is the main heart of a good running CUCV. If you have a questionable injection pump the drivability and reliability is always in question. That added to the fact you begin to loath the truck and the amount of time you spend working on it. I know my punctuation and grammar are not always the best in my posts but you get the message. If you are in Maryland I am in Pennsylvania. If you loose the patience. I can offer some assistance. But that requires the truck to be here. Let me know. I have plenty of things to do so I am not looking for work. But I wanted to make the offer. I don't do home remodeling because I can't suit myself with the end results. So I hire someone to get it done. It costs more, but in the end I have a nice job that suits me. Take Care and Good Luck. Getting the CUCV running good requires research and discovery. Don't change everything. Only what needs to be changed and repair everything as you go.
