Its supposed to be hooked up to a ported vacuum source....meaning no vacuum at idle. Do not hook it up to manifold vacuum. You will have to hook it up, as it will give you much better fuel economy, driveability, and quite an increas in part throttle performance.


1969 Nova
454/M21/3.31
Mild mid-11 second weekend cruiser

1994 F150 XLT Super Cab 2WD
5.0/4R70W/3.55
(Daily driver)