cruise control troubles! :-(

[monkeydude3]

1994 explorer four door XL 4.0L OHV. 5 speed manual transmission, 2 wheel drive. The problem with my cruise control is I can turn it on, but when I do I hear a very loud hissing like a vacuum leak coming from the left of the engine compartment. I can tell that the electronic components of my cruise control are working but they can't keep the speed properly due to this vacuum leak. Other than that I have no other vacuum leaks, only when the cruise control is on. Any ideas? thanks!

George

 

[MrShorty]

Can you locate the vacuum leak? The cruise control uses engine vacuum to actuate the servo. A significant vacuum leak like you describe will prevent the cruise control from doing it's thing.

 

[monkeydude3]

yeah... only thing is I don't know how to get the leak to come about without going 55mph or so. The leak is ONLY THERE WITH THE CRUISE ON.... ::sigh:: oh well