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Message: <blockquote data-quote="Tazza" data-source="post: 64926" data-attributes="member: 82">Ok, the screw on the top of the filter is to bleed air when you replace the filter. With it open pump the hand primer till the fuel coming out is bubble free. Close it up.The bleed screw on the injector pump is for more bleeding. Open it up and pump the hand primer, you can hear and feel as bubbles go through it. When you can feel that it is smooth and air free, close it up.The one under the pump is to drain coolant, leave it alone unless you want to drain it.There are no safety switches to sop the fuel shutoff solenoid from working. Age and bad relays can stop them working though. Even a bad solenoid. If yours works by pulling the arm near the injector pump, pull it to the run position and hold it there with a cable tie. Crank the engine and see if it starts right up. The key will not shut it down though, you need to cut the cable tie for that.</blockquote>