Author [NL] [FR] [ES] [DE] [SE] [IT] Topic: unbalanced engine noise  (Read 4615 times)

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  • Offline eagle4

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    Offline eagle4

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    unbalanced engine noise
    on: Nov 12, 2016, 05.53 pm
    Nov 12, 2016, 05.53 pm
    one of the best characteristics of this famous 1215cc 3-cylinders is its engine music : similar to a 6-cylinders, smooth, strong personality. This is what I enjoyed with my Explorer XC, confirmed by the test ride I did of the Triumph France press fleet Trophy.
    But I sadly have to say this is not the case for my recently bought TTSE : engine noise is unbalanced, at exhaust sound. It seems more like a Subaru Impreza (flat-4 high power). Something must be wrong somewhere, but impossible to find.
    Went to my dealer where they performed an Autoscan which confirmed all is ok.
    I wonder whether there is not an small air leak somewhere (intake or exhaust ??) which would not be detected by electronic : loose spark plug ? loose exhaust collector screw ? air leak at air filter ??
    The bike is still under warranty, but it seems, given the labor needed to diagnose (undress the bike....), that not many dealers will accept to dig in my problem.
    It seems there is no loss of power, nor engine over-heating, nor over gas-consumption.
    Did it happen to someone else ?
    Any idea please ?
    Cheers, Hugues

  • Offline Ebenezer   nl

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    Re: unbalanced engine noise
    Reply #1 on: Nov 12, 2016, 08.26 pm
    Nov 12, 2016, 08.26 pm
    I can hardly imagine that your TTSE sounds like this:

    You'r not the only member on this list, living in Paris. Why not try to compare the engine-noise to that of another Trophy.
    My Trophy however unfortunately lacks the typical sound that is specific for the 885, 955i and the 1050 threecilinders I owned.

    Henk

  • Offline Coconut   gb

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    Offline Coconut

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    Re: unbalanced engine noise
    Reply #2 on: Nov 12, 2016, 09.38 pm
    Nov 12, 2016, 09.38 pm
    You could try carrying out a manual "Engine Adaption"
    ( there are various Topics on the Forum about this -
    just use the Search button and type in "Engine Adaption" )

    The procedure is :
      Ensure the engine is COLD
      WITHOUT TOUCHING THE THROTTLE, Start the engine
      and allow it to warm up until the Cooling Fan comes on.
      Leave the engine to idle for a further 12 minutes.

    Other things to try are to check the Throttle Bodies are correctly seated....
    A number of our members have found them to have been fitted
    incorrectly  by Dealers after servicing ! ( They are a bit fiddly to fit correctly ! )
    There could be a slight air leak there.
    Again - use the Search buttton to find more information.

    If you haven't seen it already, there's an article on removing the Fairing here :
    HOW TO: Remove the Fairing .......

    You could also consider purchasing a "DealerTool" device.
    ( Link to DealerTool web site )
    This is a very useful after market tool that connects to the Diagnostic Connector
    located near the Main Battery, which amongst many other functions,
    allows you to check the Throttle body balance across the 3 cylinders,
    and then make adjustments as necessary to balance them.

    There's a "How TO" article on this here : HOW TO: Balance Throttle Bodies

    Hope this helps  :028:

    Last Edit: Jan 01, 2021, 10.37 am by Coconut

  • Offline eagle4

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    Offline eagle4

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    Re: unbalanced engine noise
    Reply #3 on: Nov 12, 2016, 09.50 pm
    Nov 12, 2016, 09.50 pm
    Well, these Impreza seem modified... But in some rushes, I can here the same kind of "rataratara" as what my Trophy does, instead of the normal "rhoooooo" I used to hear. Comparing with other Trophy might be useful, but my reaction is based on the comparison I already did vs my previous Explorer same engine, and with the test ride I did of another Trophy. My dealer recognized sound is not regular, but since readings on diagnosis tool are ok, does not seem to go further, which is not satisfactory to me. Hence this post seeking help and experience.
    Cheers, Hugues

  • Offline eagle4

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    Offline eagle4

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    Re: unbalanced engine noise
    Reply #4 on: Nov 12, 2016, 10.47 pm
    Nov 12, 2016, 10.47 pm
    @Coconut : many thanks for the advice, will try this engine adaptation tomorrow, and let you know the result. Anyway, the bike is covered by a 2 years warranty starting on 28 Oct. 2016. So I will avoid doing too much and risking any warranty break because of diy. But I can still try to bring my dealer on the throttle bodies track in case engine adaptation is not enough. Will also clean the rear abs sensor as I noticed erratic speed reading (on both numeric and analogic displays) when bike is on center stand with engine on in neutral : rear wheel turns at very low speed and maybe speed readings should not be jumping like this (0-5-0 km/h)
    Cheers, Hugues

  • Offline 1675   gb

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    Re: unbalanced engine noise
    Reply #5 on: Nov 13, 2016, 10.32 am
    Nov 13, 2016, 10.32 am
    Although it is difficult to describe a sound, I hope my experience helps. My bike had a 50k service a couple of months ago and my new dealer found a cracked ignition coil and an incorrectly seated throttle body. He said the coil fault was quite common on all Triumphs which use them. The bike now sounds better and is much smoother. I taske it your bike is very low mileage as there is still 2 years of warranty. The noise isn't the death rattle of the hydraulic cam chain tensioner on initial start up is it? Hope this helps.
    Last Edit: Nov 13, 2016, 10.34 am by 1675

  • Offline eagle4

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    Offline eagle4

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    Re: unbalanced engine noise
    Reply #6 on: Nov 13, 2016, 02.05 pm
    Nov 13, 2016, 02.05 pm
    Indeed, we can consider my bike as nearly new : 02/2016, 2000km, 2 years warranty started when I bought this demo bike on Oct 28th, 2016. Out of engine head recall scope.
    Autoscan done last week did not show no issue, I guess an ignition coil failure would have been highlighted there.
    Did the Engine Adaptation process this morning : no change on engine sound. I guess my next task will be to convince my dealer to check throttle bodies, and as you know, biggest workload is the fairing and tank removal... For the moment, they're reluctant to go further as they say Mother Triumph won't accept to pay as readings should remain inside tolerance...
    Can anyone advise on what should be the correct throttle bodies readings please ?
    DTC is P0000
    Last Edit: Nov 13, 2016, 02.33 pm by eagle4
    Cheers, Hugues

  • Offline Coconut   gb

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    Offline Coconut

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    Re: unbalanced engine noise
    Reply #7 on: Nov 13, 2016, 07.09 pm
    Nov 13, 2016, 07.09 pm
    Can anyone advise on what should be the correct throttle bodies readings please ?

    First of all, to be clear, this is to do with balancing the vacuum in each of the three throttles.

    The Service Manual does not give a specific figure,
    but describes balancing the Throttle Bodies - using the Triumph Dealers Diagnostic software
    to adjust Throttles 1 & 3 and balance them with Throttle 2.

    ( Throttle 2 is not adjustable - it is controlled by the throttle control motor ).

    The Service Manual diagram shows "Throttle 2 Cylinder MAP Pressure" at 481 mm/Hg,
    with throttles 1 & 3 at 480 mm/Hg, and with the display showing "Throttles Balanced".

    The "Throttles balanced"  message appears during the adjustment process
    once the throttles are balanced to an acceptable range of each other.

    If using after market equipment such as DealerTool, as mentioned in my previous post,
    the adjustment process is the same but the readings are given in kPa,
    and as mentioned by Member towersk in the HOW TO: Balance Throttle Bodies Topic,
    using the DealerTool device, his readings once balanced were 67 kPa for all three throttles.

    Hope that helps !

    Last Edit: Jan 01, 2021, 10.37 am by Coconut

     



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