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VCDS logs & questions (fuel and boost)

Discussion in 'A3/S3 Forum (8L Chassis)' started by Scullies, Apr 7, 2013.

  1. Scullies

    Scullies Well-Known Member

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    I took some time out of my busy unemployed schedule and sent the car to the "tuner" so they could sort out the over boost issue.
    I also told them it was running a little lean at the top end. ( Bill told me the previous map was running a bit lean )
    So they "adjusted" the map and I did some logging this evening as its been raining most of the day and its nice and cool outside.

    Here the logs.
    Image 1.jpg

    Image 2.jpg

    and here the questions....
    1-What is the lambda % in block 001 ? What is it telling us?
    2-Looking at lambda in block 031 - Would I be correct in saying the fueling is running a little rich now ? Block 032 shows -0.2 ( I cant find my old logs of the old map to compare this to )

    3-The N75 is still requesting max boost all the way through the rpm range. The boost is hitting 1.5bar then dies off to 1.2 at the higher rpm. What could be the cause of the boost dying off if N75 is requesting max boost? K04 just not up to it, tired turbo, boost creep?

    4-Timing pull looks very high on 2 cylinders at high rpm. Should I be concerned or its that normal?
     
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  3. badger5

    badger5 www.badger5.co.uk
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    This std k04 hardware and injectors?

    its not richer... its pretty much std until fuel dump when hot
    timing pull up top is a little excessive and probably plenty left in it mid range
    N75% at 100% is flat out nothing left.. and 1.2bar is a k04 flat out at high revs... all outa puff.. ickle turbo
     
  4. Scullies

    Scullies Well-Known Member

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    Thanks for the clarification Bill, yes its stock ko4 turbo and injectors.
    When you say dumping fuel, its that the lambda % reading showing a high positive number. Is that a duty cycle or does it mean the ecu is requesting 20% more fuel when the measuring block is a positive 20

    I got a 2.0 crank today, so the 2nd block is going off to the machine shop to accept the stroker pistons
    happy days:arco:
     
  5. badger5

    badger5 www.badger5.co.uk
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    block 001 shows the % adjustment the lambda controllers having to make to achieve the requested afr... which in itself is still pretty lean near std levels... Until hot and ecu will fuel dump >920'c from egt protection.
     

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