Re: Fuel Pump Rebuild

Posted by HH56 On 2017/5/12 15:00:45

When you disconnect the hoses from the pump and put a finger over the ports, while the engine is running if the pump is working and valves are correct, one port will have suction and one will have a slight pressure. The port with suction connects to the wiper motor and the one with pressure to the intake manifold. To have vacuum being able to be pulled thru the pump enough to affect the engine with everything hooked up and wiper off would suggest a vacuum leak in one of the hoses or wiper motor.