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Thread: 3.0 hesitation at low revs

  1. #1
    Join Date
    Jan 1970
    Location
    NSW SW Slopes
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    12,030
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    3.0 hesitation at low revs

    Hesitation at around 1300 rpm that needed significant throttle to overcome in on/off throttle driving in manual mode through the winding climbs into and out of Kangaroo Valley yesterday afternoon probably wasn't caused by the suspected MAP sensor because the sensor looked clean this morning. Sticky primary turbo vanes or actuator could be the culprit but as the primary turbo is always getting a work-out I suspect the cause is something else.

    Has anyone experienced such hesitation especially in a 3.0 and if so, what was the cure?
    MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi, RTK base station using LoRa

  2. #2
    Join Date
    Aug 2008
    Location
    Sunshinecoast QLD
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    Graeme
    Mine had a sort of miss(rough ) at 1300rpm when out of gear
    Dealer tried all sorts of stuff, LRA had no idea, went to UK technical,
    But sold car before they found out what it was. , (3lt, 65k)

    Cheers Ken

  3. #3
    Join Date
    Jan 1970
    Location
    NSW SW Slopes
    Posts
    12,030
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    Thanks Ken. This only occurred under load whereby progressively squeezing the pedal caused the engine to progressively produce less torque until it almost died then jumped to life when the pedal was given a good push. I was allowing the revs to get quite low coming out of the hair-pins then running up the revs before dropping right back for the next bend, sometimes bumping up a gear in between before dropping back again.

    I replaced the MAP sensor with a new spare and cleaned the other so will see if the hesitation re-occurs, although its not often I encounter those particular circumstances.
    MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi, RTK base station using LoRa

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