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New MAF but still low g/s in vcds...

Discussion in 'A3/S3 Forum (8L Chassis)' started by SiGainey, Sep 2, 2011.

  1. SiGainey
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    SiGainey Member

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    [Sep 2, 2011]
    Following on from sandips logging session this week, I've put a new bosch MAF in and I'm still getting slightly low readings (154g/s) following a full throttle 3rd gear run. Anyone had this before?
    #1
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  3. warren_S5
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    warren_S5 Moderator Staff Member Moderator VCDS Map User

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    [Sep 2, 2011]
    First port of call I'd check would be:

    1) check for boost leaks in hoses (even the slightest cut from an over-tightened jubilee clip can cause this). Check all hoses around / under DV etc.
    2) Check DV - does it seem OK (holding boost etc.)

    When was it last serviced (when was air filter last cleaned)?
    #2
  4. SiGainey
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    SiGainey Member

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    [Sep 2, 2011]
    Serviced last month, air filter good. Dv is not a standard one (but is a recirculating one). Have leak tested it recently and only found one leak which is now fixed
    #3
  5. SiGainey
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    SiGainey Member

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    [Sep 3, 2011]
    Bump :)
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  6. DJ_Troopa
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    DJ_Troopa K1 Driver

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    [Sep 3, 2011]
    Join the gang mate, i've had a leak for a few months now and still can't find the bastard thing. Looks like i'm gonna have to get a pressure test done!
    #5
  7. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Sep 3, 2011]
    some of you guys need to get to Bills or similar for a smoke test/diag. I am sure they could identifty leaks etc with the tester.
    #6
  8. SiGainey
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    SiGainey Member

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    [Sep 3, 2011]
    Yeah, I agree but he is a 250 mile round trip!!
    #7
  9. finesse
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    finesse Active Member VCDS Map User

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    [Sep 3, 2011]
    Shirley this is an electronic issue? MAF just measures air going in at entry of system not at throttle body.
    #8
  10. Jacko4130
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    Jacko4130 Goodie Gum Drops

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    [Sep 3, 2011]

    There must be a local garage / Tuner with a smoke tester??
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