Looking for some suggestions about an erratic cruise control.....
1990 Plymouth Voyager 3.3 autoWhen I first turn the cruise on and set the speed it will usually run OK but only for about 5 minutes or so. It will then generally just quit, as if I turned it off, but sometimes it will just gradually lose speed. Once this starts to misbehave, it won't set and maintain a speed again, at least not for quite awhile.
I know that there are 2 main parts - a "valve box?" and a vacuum-type part that has the cable to the accelerator block, both located just about under the battery.
Any suggestions about what I could try to help decide which of these parts is not operational?
I had an old Toyota with cruise once and the rubber in the vacuum piston had gotten old and cracked and so cruise stopped working on that. Toyota wanted about $300+ for a replacement part which included stuff I didn't need.....so I did without cruise.... :-(
Dave