H1 cold start shut off

[WIDELOAD]

My H1, with a 6.5L N/A motor, starts fine and then immediately shuts off on cold starts. Feels like it's flooding itself. But if I hold the gas down, it'll stay in and a lot of exhaust fumes come out the back-end but then starts running.


At the Christmas dinner, Monk talked to me about changing the fuel filter or Roy mentioned removing the filter altogether to test it. I haven't had a chance to try this yet.


Roy, there were 2 or 3 other things you mentioned it could be, what were they? Thanks.


I'm hoping to get up north soon to work on my truck once the deep freeze we're having passes.

[Roy]

Temp sensor, add diesel conditioner, glow plugs --test each one for resistance-zero resistance means replace, adjust idle up a bit or check for a stepper motor malfunction

[Monk]

Also with these temps, conditioner (as Roy mentioned) is a big plus, gel fuel could be an issue

[WIDELOAD]

Thanks! I do have the diesel conditioner in the tank but will look into all of these other options. The problem happened in the summer too.

[Monk]

I hope it's a simple as a semi plugged filter,, I swear I hate issues where it take time to find the problem,

[GreenMeanie]

I always seem to question fuel pressure when i hear this, perhaps because it has been an issue for me in the past prior to upgrading the fuel system a bit. I like to see 12psi for cold starts in the winter but i adjust for 9psi most of the time and 4ish for above 70mph. I believe on an NA it should be around 3- 5 psi. I cant see diesel moving well at 3 psi in the dead of winter. Winter brings brittle hoses to leak as well so air in the fuel is something i look at.

[WIDELOAD]

Thanks for the input and suggestions. I will take a look and report back.