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Message: <blockquote data-quote="Tazza" data-source="post: 18330" data-attributes="member: 82">I would start by lifting the cab, remove the puckup line from the top of the tank and ensure the puckup tube is not broken off or cracked. At the end there should be a filter with a one way valve at the end. This assists in priming as when you squeeze the primer bulb you need to prevent the fuel from being pushed back to the tank, this is especially true for old primber bulbs that don't seal up rite. You are opening the bleed screw on the injector pump? ensure you close it when you have primed it or it will start then simply die.When you are priming it with the bleed screw open, the primer bulb should feel firm and a constant pressure as you squeeze, no air noises as it flows through the valve and back to the fuel tank. Its sort of a feel thing, you can feel the air bubbles in the lines, har to explain. When you have a good prime close the valve and you shoudl be set.A blocked puckup tube filter will make you loose prime and the primer bulb will flatten out.See how you go with that, its easier to show and explain. The fuel system in these engines is really very simple.</blockquote>