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Thread: TD5 Smoke screen

  1. #21
    Join Date
    Jan 1970
    Location
    Singleton NSW
    Posts
    355
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    0
    Quote Originally Posted by discowhite View Post
    s
    you loose pressure whilst retaining the fuel delivery hence the smoke.
    OK - my knowledge of the td5 is not that good but even the most basic EMS for a turbo with electronic fuel management has fuel volume delivery compensation for air intake pressure & temp etc.

    I'm sure that the td5 EMS ECU would have all of that otherwise it just wouldn't work.

    I'd think that the only scenario where the EMS would not be able be able to cope/compensate is in the final injector tip fuel delivery/spray pattern.
    Something as basic and prehistoric as air pressure input would have to be accounted for.

  2. #22
    Tombie Guest
    TD5

    AAP sensor at Airbox
    MAF after airbox
    IAP at inlet manifold

    Scenario is boost coming up, fuel delivery rises
    AAP + MAF read increased consumption of air
    IAP reads increasing pressure at manifold

    Hose delamination expands, rapidly blocking flow to IC

    IAP pressure drops rapidly
    AAP + MAF still reading high

    Large burst of fuel then fuel cut off as boost drops
    MAF reading drops
    Fuelling drops

    Delamination bubble deflates

    Flow returns, boost increases, fuel increases...

    Blockage returns.....

    More smoke!

    Repeats as long as your holding down the throttle!!!!

  3. #23
    Join Date
    Jan 1970
    Location
    Singleton NSW
    Posts
    355
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    Thanks Tombie

    I'm glad someone else 'knows' about the bubble delam issue and not assumes that a delam results in a burst duct!

    My td5 didn't have this repeat scenario but instead the EMS detected the total air blockage and shut the whole thing down.

    I had to lock it, immobilise it and then unlock, restart and keep repeating until it worked. Eventually had to remove battery connection and do a 'full reboot' - until I discovered the issue and did the internal duct reinforcement repair.

  4. #24
    Join Date
    Jan 1970
    Location
    Padstow NSW
    Posts
    4,501
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    so where in any of my posts did i mention that
    delam results in a burst duct!
    none... maybe you should listen to whoever said this
    Sorry, I assumed that you read the above posts fully
    youve taken my comments way out of context, so dismount and get on with your life.
    ive manned up and said i got the wording of your post confused so whats the issue.


    cheers phil

  5. #25
    Join Date
    Oct 2008
    Location
    victoria melbourn
    Posts
    155
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    im off to buy some fully sick hectic new pipes for my turbo, mean wile my td5 chews on its cigar. thanks for the tips boys.

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