Originally Posted by jtcu
the mechanic that fixed the fuel leak said, my vacuum hose is lose? What is happening is air is somehow leaking into where the fuel should be and it is causing a rough idle and a hard startup. Does someone have some experience with this and is it something I would be able to fix or would it be better to take to a mechanic?
I had this same problem with my bus a few months ago. Here's a post on it. viewtopic.php?f=11&t=1488&st=0&sk=t&sd=a
Basically what happened in my case is the fuel line from the tank to the lift pump had some minor leaks in it. Usually when you think of a fuel line leak you think of fuel leaking out, well in my set up (probably yours too) the diesel is sucked from the tank to the engine through a long rubber hose (like a big straw). When it leaks it won't necessarily leak diesel out but suck air in. I traced my fuel hose from the engine to the fuel tank and found this...
I bought some new rubber hose to replace the cracked parts of mine and replaced that old fuel filter. And now my bus starts right up.
Try checking your rubber fuel line back to the tank, you might have a leak.