Re: Cruise Control

["Ryan Gemmill" <RGlist00@hotmail.com>]

Steve:

Actually, with all due respect, I meant the servo. (Assuming my vocabulary
is correct and servo=the bubble-like thing that holds the throttle.) Should
this not be possible? Because it has worked time and time again. I picked it
up from my tech who's used it for years on so many cars. I can only think of
two explinations if you are correct: a) the vent mechanism isn't working
properly and is locked shut or b) would the vent stay closed if the car is
turned off with the CC on but not engaged? Nonetheless, the chances that the
either of these possibilites is in fact in effect on my car are slim. My CC
is running perfectly and I can go out and perform that test right now.

Maybe there is an element we are both forgetting?

Thanks for the response and the info. I really hope we can come to a common
conclusion because either something (else) is wrong with my car, or I've
been believing in and giving out bad info.

Ryan Gemmill
85 5ks; 86 5ks; 91 200T


> By any chance did you mean the vacuum pump rather than the servo?  The
> cruise control's pump has a vent valve to open the system when the CC is
> off.  IME with the car off you can squeeze the vacuum servo all that you
> like, air will enter and exit the system from the vent.  OTOH, if you pull
> the vacuum hose from the _pump_ and then squeeze the air out of the servo
> and then seal the line the servo should remain in place.  This will allow
> you to confirm that there are no leaks in the other components and that
the
> vacuum switches on the brake and clutch are closed, but it does not
> exhonerate the pump itself.