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Boost leak, Weak Actuator or boost gauge?

Discussion in 'A3/S3 Forum (8L Chassis)' started by DaveA3, Jul 29, 2011.

  1. DaveA3
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    DaveA3 Audi A-Trizzle!

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    [Jul 29, 2011]
    Hi All,

    I have a bit of a problem with my boost at the moment. When i floor it in 2nd or 3rd i reach about 5000rpm and the boost starts to drop dramatically until about 11 psi up to 6500rpm :wtf:

    :racer: Now when i hit boost around 2500 it goes up to 20 then almost immediately drops to 17-18psi then holds and drops as above at around 5000rpm.

    So is it just my pathetic noob turbo (k03), a boost leak of some sort, my actuator (r-tech said it was weak when i got it remapped last year) or just a dodgey boost gauge.

    What you reckon peeps? I plan on getting it scanned this weekend if i get time. (which blocks do i measure for boost btw? (can u do it on VCDS lite))

    Cheers! :icon_thumright:
    #1
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  3. badger5
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    badger5 www.badger5.co.uk Site Sponsor

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    [Jul 29, 2011]
    k03 wont hold boost at high revs.. its tiny
    #2
  4. DaveA3
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    DaveA3 Audi A-Trizzle!

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    [Jul 29, 2011]
    ok so its all in my head and its just a crappy turbo? i swear if never used to do it this badly though
    #3
  5. badger5
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    badger5 www.badger5.co.uk Site Sponsor

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    [Jul 29, 2011]
    they can loose their performance and ability to hold boost at high revs with age.. and leaks will murder their flow/pressure ability.. Also well worth checking it for leaks.. smoke test reveals all sorts if you have somewhere local who have this kit
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  6. DaveA3
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    DaveA3 Audi A-Trizzle!

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    [Jul 29, 2011]
    ok cheers im going with my mate tonight to a local remap place so will ask em there. Vagtech i think theyre on here actually. will see if they have the smoke test
    #5

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