Just finished searching for this information but I have a few questions
1 I assume that the line going from the manifold to the vacuum pump goes to the side that expels the air (opposite of the vacuum side that sucks in the air)
then a line goes from the vacuum side of the pump to the wiper motor
If that is the case there must be a check valve of some sort to prevent the vacuum pump from just being a vacuum leak for the engine since it would be pumping air into the vacuum port right?
2. My wipers barely work at idle. I have rebuilt the wiper motor and no improvement. They work when they want. Will the vacuum fuel pump help me or do I need a system that works better first.
The wipers work better when wetter...heavy rain not to bad, light rain or mist forget it they barely move and get stuck often. I put some rain x on the windshield which helps with visibility.
3. I get about 19 inches of vacuum from the engine manifold port is that enough?
Rich
