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3.0 TDI idle speed?

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by Mr-C, Feb 20, 2013.

  1. Mr-C
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    Mr-C Active Member

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    [Feb 20, 2013]
    Mine is at about 800 rpm, to me it does sound a bit on the fast side. Whats yours? or what should it be?
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  3. Steve220
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    Steve220 Member

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    [Feb 20, 2013]
    Is that from cold?
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  4. A4_MaJiK
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    A4_MaJiK Azeem

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    [Feb 20, 2013]
    Seems about right to me...(same as mine).
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  5. Mr-C
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    Mr-C Active Member

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    [Feb 20, 2013]
    Same hot or cold
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  6. jjmurphy21187
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    jjmurphy21187 Tiptronic

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    [Feb 20, 2013]
    Should drop slightly when the engine has warmed up, maybe 50rpm or so? Mine sits at about 850-900rpm when cold and 775-825rpm when warmed up.

    Sounds about right though. I think you can adjust the idle speed on VCDS... but I'm not 100% on that
    #5
  7. Mr-C
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    Mr-C Active Member

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    [Feb 20, 2013]
    Cheers guys, mine must be right then
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  8. gupsterg
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    gupsterg Active Member

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    [Feb 20, 2013]
    Mine on a 3.0 TDi A6 (same engine) can be 1000 rpm when really cold/first start of the day, then gradually drops as car warms...

    When warm/not cold outside temps will be around 800rpm...

    Anyone got info on this please?
    #7
  9. A4_MaJiK
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    A4_MaJiK Azeem

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    [Feb 20, 2013]
    Why would you want to adjust the idle speed anyway (out of curiosity)?
    #8
  10. gupsterg
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    gupsterg Active Member

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    [Feb 20, 2013]
    I have an issue which has got right on my wick! it is an idle hunt/flutter its not just the needle it is the engine... it happens just after crank finish of engine, initially for a moment the engine is smooth then it go nuts!

    It has been suggested to me an idle increase at startup may help..

    I've DIY done:-

    Full set of injectors, MAF, Throttle body, Battery, full service...
    EGR inlet into charge air decoked, EGR valve/cooling flap been vacuum tested/MVB 03 done(visual/decoke soon to be done)...

    I've had done:-

    Full set of chains & tensioners, Tiptronic oil change, Last rev of engine ECU software done...

    Soon to be done is Ins.cluster flash to last rev of SW as TPI/TSB suggest bad comms between engine & ins.cluster with SW I currently have (should also give me digi.speedo in DIS :) ) ...

    Sorry OP for hi-jack :blush:... I have no fault codes to go by :( ... fuel pressure/rail/pump MVB look good as well...
    #9
  11. Darren198712
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    Darren198712 Member

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    [Feb 20, 2013]
    inlet manifold maybe on a 3.0 ?
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  12. Steve220
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    Steve220 Member

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    [Feb 20, 2013]
    Could be manifold flaps or air in the fuel line if its a derv.
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  13. gupsterg
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    gupsterg Active Member

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    [Feb 20, 2013]
    Fuel lines air free... the clear section of fuel line to the HPFP pump is always full and bubble free...
    Lower/upper intake manifolds will soon be decoked but no faults checked visually and VCDS test of MVB/actuations...

    I will leave posting in this thread now unless someone give info on idle adjustment...

    Going to MRC tuning soon to see if they can diagnose anything...
    #12
  14. .Jas.
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    .Jas. Member

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    [Feb 23, 2013]
    Mine is the same, about 800 RPM, I always thought it seemed a little high but it is the average
    #13

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