Yeah, I forgot to mention it's a Garret. I inspected the hose and it's clear and I did not see any cracking, but I think I will put a piece of new fuel hose on there to see if it clears up the problem.

I did just watch a video showing how to take the cover off the assembly, not hard or crimped, and then the diaphragm just unscrews from the threaded valve shaft. I will try to find a good used assembly, but it may take a while. That's why I was wondering about a temporary fix for the rubber diaphragm if it is ripped.

If my valve is stuck, I'll give the kroil a try, and maybe polish up the valve shaft some

Thanks for your replies.

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1985 300TD