a crazy wiper door
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
You have a little leak somewhere.Possibly the 3 port check valve.
Edit -try this-start engine and let vacuum build-pinch the hose between 3 port valve and the manifold-shut the engine off-restart engine-if the door doesnt go up and down then it was the 3 port valve.
Edit -try this-start engine and let vacuum build-pinch the hose between 3 port valve and the manifold-shut the engine off-restart engine-if the door doesnt go up and down then it was the 3 port valve.
Last edited by ...Roger...; Jun 19, 2007 at 04:48 PM.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Could be the check valve, or a plugged filter (in the same line from the intake manifold), or a malfunctioning wiper solenoid valve/switch gizmo on the back of the tachometer (driver's dash). You will need a vacuum gauge to diagnose the problem.
