[Forrest]

your title says "factory cruise"....Is yours an original late 60's early 70,s. if so,.More than likely you have a vacuum leak somewhere..holding the button is electrically sustaining the speed releasing it, the vacuum should hold it..the brake switch releases the vacuum to the servo...check for vacuum leaks at all connections and hoses..could be inside the servo unit/regulator .. that's no good

[1970gpsj4speed]

Originally Posted by Forrest

More than likely you have a vacuum leak in the regulator...holding the button is electrically sustaining the speed releasing it, the vacuum should hold it..the brake switch releases the vacuum to the servo...check for vacuum leaks..could be inside the servo .. that's no good

so if i cap off one side and mighty vac the other should it hold .nothing leaks outside the regulater.i have a S and a M how do i test it ?


update just tested the hose and fitting going to bellows (original) leaking let me try something