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Thread: Idle speed fluctuations

  1. 25th February 2008, 09:46 PM #1
    B92 8NW
    B92 8NW is offline YarnMaster
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    Idle speed fluctuations

    When idling at traffic lights in "D", I sometimes experience a slight ripple in the idle speed on my 300Tdi Disco. Since shifting into neutral stops allows a normal idle speed, I'm assuming that the load on the engine is not static when idling in drive. I know that the autobox needs a fluid a filter change badly, but what else could cause an occasional fluctuation in idle speed.
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  2. 25th February 2008, 09:50 PM #2
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    87County
    87County is offline AT REST
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    there have been earlier threads rcently that included this... as I remember it has to do with pump settings - mine does it and I've never worried about it

    AIR Blknight.aus explained it

    try a search here on 300tdi + pump or idle speed

    regards - Laurie
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  3. 25th February 2008, 10:35 PM #3
    isuzu110's Avatar
    isuzu110
    isuzu110 is offline Master Supporter
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    My 300TDI manual fluctuated at idle due to the lift pump being faulty. It can fail without you noticing it. Relatively cheap and easy to replace yourself.
    '95 110 300TDI, F&R ARB Lockers, Twine Shower, Aux Sill Tank, Snorkel, Cargo barrier, 9 seats, swingaway wheel carrier, MadMan EMS2
    '85 110 Isuzu NA 4BE1 3.6l Diesel, 0.996 LT-95, Rear Maxi (SOLD)
    '76 SIII 109" Nissan ED33 5-SP Nissan GBox (SOLD)
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