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Thread: 300tdi basic tune and high EGT’s what happening?

  1. 1st March 2019, 02:40 PM #1
    TOR
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    300tdi basic tune and high EGT’s what happening?

    I’ve had a basic tune in my 300tdi, boost pin rotated and star wheel wound in. I then went away for the weekend and noticed the car floor seatbox was hot. I’ve decided to put an egt on and check what the exhaust temps were. Very shocked to find I could easily get to 730 (backed off at this point) unloaded and cruising up a slight hill near home. Now when I went away I was towing a smallish trailer and the car was more heavily loaded, so i can only assume I was reaching damaging levels. What else can cause such high EGT’s? Car isn’t blowing any black smoke at all and i can’t see any exhaust restrictions?

    Where do I go from hear? And how should I check for damage?
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  2. 1st March 2019, 03:22 PM #2
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    If not overfuelled, High EGT could be air intake restriction or boost leak. Do you have a boost gauge?
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  3. 1st March 2019, 03:32 PM #3
    TOR
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    Quote Originally Posted by manic View Post
    If not overfuelled, High EGT could be air intake restriction or boost leak. Do you have a boost gauge?
    I do have a boost gauge, its a digital gauge and seems to be reaching around 19-20 max (takedn from the inlet manifold). It does however fluctuate up and down a bit as the boost is climbing but I always thought this may just be an issue with the gauge.

    Regarding the air intake restriction, do just mean a dirty air filter or is there something else I should check?
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  4. 1st March 2019, 10:26 PM #4
    BigBlackDog Guest
    That's a lot of boost if it's the standard turbo. Has it been fiddled with? The fuel pump mods won't effect it that much for boost. The compensator on the injection pump basically shovels in more coal when it sees more air. Restrictions, particularilly downstream of turbo compressor, are going to cause less air more temp.
    Apart from the super boost I'd say you've just wound up the fuel too far.
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  5. 1st March 2019, 10:54 PM #5
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    Quote Originally Posted by TOR View Post
    I’ve had a basic tune in my 300tdi, boost pin rotated and star wheel wound in. I then went away for the weekend and noticed the car floor seatbox was hot. I’ve decided to put an egt on and check what the exhaust temps were. Very shocked to find I could easily get to 730 (backed off at this point) unloaded and cruising up a slight hill near home. Now when I went away I was towing a smallish trailer and the car was more heavily loaded, so i can only assume I was reaching damaging levels. What else can cause such high EGT’s? Car isn’t blowing any black smoke at all and i can’t see any exhaust restrictions?

    Where do I go from hear? And how should I check for damage?
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  6. 2nd March 2019, 08:47 AM #6
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    ^^^^^^ Just do it....
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  7. 2nd March 2019, 12:58 PM #7
    TOR
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    Quote Originally Posted by Blknight.aus View Post
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  8. 2nd March 2019, 09:28 PM #8
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    then let us know
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  9. 2nd March 2019, 09:32 PM #9
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    Road Trip?
    "How long since you've visited The Good Oil?"

    '93 V8 Rossi
    '97 to '07. sold.
    '01 V8 D2
    '06 to 10. written off.
    '03 4.6 V8 HSE D2a with Tornado ECM
    '10 to '21
    '16.5 RRS SDV8
    '21 to Infinity and Beyond!

    1988 Isuzu Bus. V10 15L NA Diesel
    Home is where you park it..

    [IMG][/IMG]
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  10. 3rd March 2019, 09:28 AM #10
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    from the phone call...

    sounds like its been overtweaked for the available boost.
    Dave

    "In a Landrover the other vehicle is your crumple zone."

    For spelling call Rogets, for mechanicing call me.

    Fozzy, 2.25D SIII Ex DCA Ute
    Tdi autoManual d1 (gave it to the Mupion)
    Archaeoptersix 1990 6x6 dual cab(This things staying)


    If you've benefited from one or more of my posts please remember, your taxes paid for my skill sets, I'm just trying to make sure you get your monies worth.
    If you think you're in front on the deal, pay it forwards.
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