Ernie Baily Posted March 14, 2023 Report Share Posted March 14, 2023 I am planning on changing my stock fuel pump on my 48 Plymouth to a 49-50 Plymouth double action fuel pump in a effort to have a more constant vaccum to the wipers. Does any one have a diagram on how to connect the vaccum lines/hoses? Please Advise, Thanks Ernie Quote Link to comment Share on other sites More sharing options...
Loren Posted March 14, 2023 Report Share Posted March 14, 2023 The way I did it was to connect the OUT side to where the wipers originally connected on the manifold. Then the suction side to the wipers. This way the engine's vacuum contributes to the cause. You can confirm the inlet/outlets by starting the engine without any connections except the fuel. Quote Link to comment Share on other sites More sharing options...
kencombs Posted March 14, 2023 Report Share Posted March 14, 2023 2 hours ago, Loren said: The way I did it was to connect the OUT side to where the wipers originally connected on the manifold. Then the suction side to the wipers. This way the engine's vacuum contributes to the cause. You can confirm the inlet/outlets by starting the engine without any connections except the fuel. Agreed, and suggest that one should always add a vacuum reservoir to the system. With check valves of course to allow the wipers to run on the saved vacuum when engine/pump vacuum is lower that the reservoir level. 1 Quote Link to comment Share on other sites More sharing options...
Pete Posted March 18, 2023 Report Share Posted March 18, 2023 Quote Link to comment Share on other sites More sharing options...
Ernie Baily Posted March 18, 2023 Author Report Share Posted March 18, 2023 This diagram helps alot! Thank You! Quote Link to comment Share on other sites More sharing options...
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