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Thread: Jumpy tacho??

  1. 6th January 2008, 12:22 PM #1
    billyjack Guest

    Jumpy tacho??

    Hi guys, the tacho in my 98 petrol disco is jumping around when cruising, it appears to be steady during acceleration.Any clues to it's complaint?
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  2. 6th January 2008, 12:26 PM #2
    tdiBrad
    tdiBrad is offline Fossicker
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    I had a 97 D1 v8 for about 12 months (9 years ago !), and had the same problem. It was fixed under warranty (took the dealer about ten minutes), but for the life of me I cannot remember what the problem was.

    I am pretty sure that it wasn't some major $$$ part that was replaced .
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  3. 6th January 2008, 12:30 PM #3
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    dmdigital
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    Check , clean and tighten the W plug connection on the back of the Alternator, this feeds the tacho. If it's dirty , corroded or loose you'll get these symptoms.
    MY15 Discovery 4 SE SDV6

    Past: 97 D1 Tdi, 03 D2a Td5, 08 Kimberley Kamper, 08 Defender 110 TDCi, 99 Defender 110 300Tdi[/SIZE]
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  4. 6th January 2008, 12:58 PM #4
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    BigJon
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    Quote Originally Posted by dm_td5 View Post
    Check , clean and tighten the W plug connection on the back of the Alternator, this feeds the tacho. If it's dirty , corroded or loose you'll get these symptoms.

    X2...
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  5. 6th January 2008, 01:53 PM #5
    Rad97
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    jumpy tacho

    Gday mate had the same problem and all it was was the wire on the back of the alternator with the spade plug just put a new plug on it and that it!
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  6. 6th January 2008, 06:15 PM #6
    billyjack Guest

    Jumpy tacho

    Thanks for comments, loose wire at rear of alternator..
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  7. 16th June 2011, 05:30 AM #7
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    Disco_Balls
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    Thumbs up

    Thanks for the tips guys!!

    You need:
    8mm socket, small round crimp terminal and crimping tool and literally 2 mins and the problem goes away, fixed my issue before I left for work
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