[V8] Diagnosing intermittent cruise control problem

[Scott Phillips]

Bryan, 

There is a electric vacuum pump under the drivers fender (behind the
hyd. Res.) check there for both contact issues as well as vacuum issues.
Then the vacuum line that travels down to the diaphragm (which often
gets soaked with leaking fluids) is either ready to be replaced, or just
loose on the diaphragm nipple. 

Otherwise it sounds like you could have a failing switch (in the column)
the wiring there is a bit touchy..

Good Luck!. 

Scott P