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Thread: My Speedo is 10kmh out. Speed sensor?

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    L67 Calais's Avatar
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    Default My Speedo is 10kmh out. Speed sensor?

    Hey all as previously posted if my VP 5 speed is rolling (even out my driveway) At any speed at all the revs stay really high right up until it stops rolling, Then drops to a nice idle speed. Also went for a cruise in it today with my missus following in her Excel & She swears i was doing 70 in the 60 zones & 60 in the 50 zones!! But my speedo was reading 60 & 50..... Could this be a Speed sensor issue? Speedo doesnt jump & there is no error codes. Any ideas? Also where would i get a new one if required for the T5 & how much. Sorry 4 the essay. Cheers

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    get a phone with a gps to check it.
    if it is a constant 10km hr then maybe replace cluster of speedo or if you are a real cheapskate twist the needle back and test it untill you get it right.

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    1. have you been past speed camera's?
    2. have you got a fine from them speed camera's?

    if the answer to 1 is yes, and no to 2...... then dont worry about it i wouldn't

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    azkwazere is offline Ahhh Yes, Ahhh Yes....
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    1. What size wheels + tires you got
    2. Diff gears?
    3. Factory Manual?
    4. Do you wear glasses?
    5. Can you read english?

    aZk.

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    I'm skidding around in my mum's excel at the moment, and I know the speedo in that is shagged. It's out by 10kph at 50-80. So find another way to test your speedo before you decide that it's rooted. Excels aren't the most accurate themselves.
    Gravity is proof that nature keeps getting us down.

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    Quote Originally Posted by azkwazere View Post
    1. What size wheels + tires you got
    2. Diff gears?
    3. Factory Manual?
    4. Do you wear glasses?
    5. Can you read english?

    aZk.
    1. 15 inch 205s
    2. Too long (factory)
    3. Yes
    4. No
    5. Yes

    Thankyou this has been very helpful.

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    youre using an excel to compare it? those things probably have needles glued on

    1995 Manual HSV Clubsport
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    Quote Originally Posted by MISTER VP View Post
    Hey all as previously posted if my VP 5 speed is rolling (even out my driveway) At any speed at all the revs stay really high right up until it stops rolling, Then drops to a nice idle speed. Also went for a cruise in it today with my missus following in her Excel & She swears i was doing 70 in the 60 zones & 60 in the 50 zones!! But my speedo was reading 60 & 50..... Could this be a Speed sensor issue? Speedo doesnt jump & there is no error codes. Any ideas? Also where would i get a new one if required for the T5 & how much. Sorry 4 the essay. Cheers
    Anyone? And got a code today, Guess which one..... 24! Speed sensor! Any idea where its located (been told behind the cluster And how much im lookin at paying?

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    you can get a speedo corrector kit from jaycar for $50 and there is a how to on the froums for the install, if it is the speed sensor and you want to replace it and if it is located behind the cluster dont let that put you off as clusters are one of the easiest things to pull out and apart
    "A life lived in fear is a life half lived"

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    Quote Originally Posted by MISTER VP View Post
    Anyone? And got a code today, Guess which one..... 24! Speed sensor! Any idea where its located (been told behind the cluster And how much im lookin at paying?
    The speed sensor is on the side of the transmission, recognisable by the cylindrical white three pin plug attached to it. The raw signal from that goes to the printed circuit board in the instrument cluster before being sent to the ECM. A fault anywhere in those circuits can trigger the code.

    A speed sensor, instrument cluster and ECM will all be available inexpensively from wreckers, POA. However, they may also be faulty or the fault may lie in the wiring or connectors.

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    check to ensure the sensor pins are clean...and nothing wrong with getting a new sensor anyway....nearly 20yrs old so.....

  12. #12
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    Chirpstr is offline A new project attack
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    Yeah new sensor is like $160+ lol. Just go through all the VN/VP auto/manual speed sensors at the wreckers and make sure none of the three wires are perished and touching each other...(auto/manual speed sensors are the same with VN/VP with those type of gearboxes)

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    Quote Originally Posted by Wavez View Post
    Yeah new sensor is like $160+ lol.
    lol..true, but speeding fines can be much more when lose of points come into it....but if one must, the wreckers is always there.

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    Quote Originally Posted by MISTER VP View Post
    Hey all as previously posted if my VP 5 speed is rolling (even out my driveway) At any speed at all the revs stay really high right up until it stops rolling, Then drops to a nice idle speed. Also went for a cruise in it today with my missus following in her Excel & She swears i was doing 70 in the 60 zones & 60 in the 50 zones!! But my speedo was reading 60 & 50..... Could this be a Speed sensor issue? Speedo doesnt jump & there is no error codes. Any ideas? Also where would i get a new one if required for the T5 & how much. Sorry 4 the essay. Cheers
    Who says it's your speedo that is out? Could have been the Excel.
    Illegitimi Non Carborundum

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    Well got the sensor from u pullit today n fitted it & reset computer. No codes and car now matches the speed of the excel almost perfectly! Cheers guys


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