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Thread: 3.9 Rover VSS

  1. 9th May 2013, 06:11 PM #1
    Landiheaven Guest

    3.9 Rover VSS

    Hi, Does anyone know whether you need to have a VSS signal to the 14cux ECU? Starting to convert my 110 from 3.5+LT95 to 3.9+ZF trans, and If I need the VSS, looks like I will have to convert to an electronic speedometer? Many thanks
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  2. 9th May 2013, 06:41 PM #2
    PhilipA
    PhilipA is online now Swaggie Subscriber
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    The VSS does a few things on a 14CUX
    1. with TPS decides whether to cut off injectors for overrun.
    VSS signal + RPM >1500+ TPS < 0.49 Volts =injector cutoff
    2. VSS signal + TPS <0.49V= stepper idle up to 1100RPM
    Neither is crucial to operation but NTH particularly on an auto
    Regards Philip A
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  3. 9th May 2013, 06:42 PM #3
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    Homestar
    Homestar is offline Super Moderator & CA manager Subscriber
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    No, it isn't necessary. There are threads on here somewhere about this. Just done this conversion in my Rangie and it is fine without one.

    You can experience uneven idle when pulling up to a stop, but that's about it I believe.
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.
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  4. 9th May 2013, 07:02 PM #4
    Landiheaven Guest
    thanks alot, I guess I will try it and see how it goes, otherwise it'l be expensive to convert it to electronic speedometer
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  5. 9th May 2013, 07:27 PM #5
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    Homestar
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    You'll be right.

    Mine works a treat without it.
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.
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  6. 9th May 2013, 09:39 PM #6
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    BigJon
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    As above, don't lose sleep over it. My Rangie has been running just fine without VSS for about 4 years now.
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