1990 Voyager cruise control

Discussion in 'Voyager' started by davemcc, Nov 21, 2005.

  1. davemcc

    davemcc Guest

    Looking for some suggestions about an erratic cruise control.....

    1990 Plymouth Voyager 3.3 auto

    When 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.... :-(

    davemcc, Nov 21, 2005
  2. davemcc

    Mr. Caravan Guest

    Sounds like a vaccum leak to me. A vehicle of its age can develop a
    defective hose to the vaccum reservior, the reservior could be brittle
    and cracked. Make a visual inspection of all the elements and consult
    the shop manual (if you have one) for more troubleshooting. Cruise
    problems can be easily detected, at least from my experience, anyway.
    Good Luck! Hope this is a good start to resolving the problem.
    Mr. Caravan, Nov 22, 2005
  3. davemcc

    damnnickname Guest

    There are many main parts, the servor,the speed sensor, the brake switch,
    the cruise control switch, the vaccum supply and circuit harness. Instead
    of guessing at the problem, take it to the dealer or whoever and ask them
    to see what the last cruise control cut out was in the Monitored section
    of the Scan tool while it happens. In other words if you are using the
    cruise control and it cuts out for no reason at all the Engine controller
    will see what made it turn off.If it shows the brake switch did it and you
    know the brakes werent applied then the switch would be faulty, and so on.

    Glenn Beasley
    Chrysler Tech
    damnnickname, Nov 22, 2005
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