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Cruise control won´t work properly

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    #1

    Cruise control won´t work properly

    Hi guys.
    i´ve got a problem with my CC...

    all the buttons work fine, but when im setting a speed, for example 60 MPH, the car accelerates up to 62, than slows down to nearly 55, and goes up to 62...
    you can see the accelerotor pedal goes up and down... it doesn´t drive exactly the speed i´ve set...

    i found no leaks in the vac-lines... is it an electrical problem?

    i hope you can help me

    chris
    Living in a Box
    Tags: None
    #2
    good chance its the speed sensor. Located between the cable and the speedo gear were it connects to the trany.
    Scars are tatoos of the fearless

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      #3
      ok, thanks...
      i hope, i can find a VSS in Germany... that would be a problem... ai ai ai....
      Living in a Box

      Comment

        #4
        Speed sensor or a vacuum leak. The vacuum line has a T and 2 check valves in it. If the check valves are leaking, they can cause problems. There is also a vacuum dump attached to the top of the brake pedal. You might want to disconnect the cruise where it hooks to the vacuum tree, and try pumping it up with a hand vacuum pump to see if it holds.
        86 Lincoln Town Car (Galactica).
        5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

        91 Lincoln Mark VII LSC grandpa spec white and cranberry

        1984 Lincoln Continental TurboDiesel - rolls coal

        Originally posted by phayzer5
        I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

        Comment

          #5
          what year is this car? does it have intergral cruise or stand alone?

          If the speed sensor were bad, the cruise won't work at all. the problem you are describing sounds like a bad amplifier.
          2003 Town Car Signature - 3.27 RAR, Dual exhaust and J-mod - SOLD 9/2011
          89 Crown Victoria LX HPP -- SOLD 9/2010
          88 Grand Marquis LS - The Original -- Totaled 5/2006

          I rebuild AOD/AODE/4R70W/4R75E transmissions....Check out my Facebook page: https://www.facebook.com/pages/North...48414635312478

          Comment

            #6
            it´s a 89 CS. i think it have an integral cruise, i don´t see a amplifier under the dash, only the computer.
            but correct me, if i´m wrong.

            i´ll try to get some pictures today
            Living in a Box

            Comment

              #7
              88+ is integral. No amplifier under the dash.
              86 Lincoln Town Car (Galactica).
              5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

              91 Lincoln Mark VII LSC grandpa spec white and cranberry

              1984 Lincoln Continental TurboDiesel - rolls coal

              Originally posted by phayzer5
              I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

              Comment

                #8
                pull the trouble codes and see if anything is stored in the ECM. the cruise system does have the ablity for diagnostics, but you will need a hand held scanner to do it.

                it is possible the cruise servo is faulty, either electrically or leaking vaccum internally. both of my cars have leaking cruise servos
                2003 Town Car Signature - 3.27 RAR, Dual exhaust and J-mod - SOLD 9/2011
                89 Crown Victoria LX HPP -- SOLD 9/2010
                88 Grand Marquis LS - The Original -- Totaled 5/2006

                I rebuild AOD/AODE/4R70W/4R75E transmissions....Check out my Facebook page: https://www.facebook.com/pages/North...48414635312478

                Comment

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