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Cruise Control partial failure (99 Protege ES)

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    Cruise Control partial failure (99 Protege ES)

    Hi, I was hoping someone could explain these quirks in my cruise control operation:
    -when I set it initially, it lets speed fall about 4 MPH before actually engaging
    -whenever it's on, it constantly bounces above/below the set speed, i.e. setting it at 70 MPH makes it bounce between 69 and 71 every 5 seconds
    -and finally, nudging the lever up or down (to accel/decel in small increments) doesn't really work: the engine revs like it's trying, but speed doesn't change (holding the lever for a second or more works fine)

    I got a throttle body cleaning and also installed a new throttle cable, so that's not it.
    Help appreciated.

    #2
    lube the cable and check for vacuum leaks on all the hoses and main canister


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