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only 5psi of boost

Discussion in 'A3/S3 Forum (8L Chassis)' started by Plunky, Nov 1, 2010.

  1. Plunky
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    Plunky Member

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    [Nov 1, 2010]
    I started using the a3 today after 2 months of it being sat. I had to jump the battery as it was dead but afterwards all seemed fine, I let her warm up and then proceeded to go for a drive but then realised the car was only producing 5psi of boost under load in all gears. I realise the boost is running off of the wastegate pressure and bypassing the n75. I have changed the n75 but still the same problem.
    Any ideas?
    Cheers
    Liam
    #1
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  3. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Nov 1, 2010]
    fault codes?
    #2
  4. s3dave
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    s3dave TFSI Hybrid Supporter

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    [Nov 1, 2010]
    Limp mode at a guess
    #3
  5. Plunky
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    Plunky Member

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    [Nov 1, 2010]
    Havnt scanned it yet. How would I get it out of limp mode? Vagcom needed?
    #4
  6. Welly
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    Welly VX220 SC Driver :)

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    [Nov 1, 2010]
    Yep, fault codes. Why hunt for a problem that the ECU may tell you in 2 minutes?
    #5
  7. Plunky
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    Plunky Member

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    [Nov 2, 2010]
    used the car this morning after having the battery on charge all night due to it being flat. Its fixed itself! :D boosting like it did before, perfect!
    #6
  8. Prawn
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    Prawn My other car is a MINI!!!!

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    [Nov 2, 2010]
    awesome news Liam.

    If you want to pop round one night and scan it just give me a text. Can get that bonnet strut too!

    Plus, I want a ride whilst you've still got it :)
    #7

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