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boost gauge help

[ sam ] Nov 4, 2018

  1. [ sam ]

    [ sam ] New Member

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    Hi all my boost gauge has been fitted when stationary it reads minus 30 psi
    Is that normal everything I have read so far suggest it should be minus 20 psi is this bad?
     
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  3. desertstorm

    desertstorm Moderator Staff Member Moderator VCDS Map User TDi Audi A4 Audi Avant Owner Group quattro

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    Normal atmospheric pressure is + 14.7 psi in relation to a vacuum at 0 psi. You can't have -20 psi if you are measuring from normal ambient pressure. On my boost gauge idle is around -0.65 to -0.7 bar so that around -9.5 to -10.3 Psi .
     
  4. [ sam ]

    [ sam ] New Member

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    ok well it is minus 30 hg so minus 14.73 psi
     
  5. desertstorm

    desertstorm Moderator Staff Member Moderator VCDS Map User TDi Audi A4 Audi Avant Owner Group quattro

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    Where have you connected the pick up point for the gauge?.
     
  6. [ sam ]

    [ sam ] New Member

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    I T off the fpr I think thats what you mean why ?
     
  7. AmanDosangh

    AmanDosangh Member

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    I would change that, and have it off the dv line instead. You get a leak from your connection to the fpr and will mess with your fuelling


    Sent from my iPhone using Tapatalk
     
  8. [ sam ]

    [ sam ] New Member

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    ok will do that today thanks but the question still remains is minus 30 hg normal?
     

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