Monster MotorsportAH Fabrications
Results 1 to 2 of 2
  1. #1
    Reverse Gear

    Join Date
    Nov 2012

    boost/vacum problem

    im pretty new to this whole petrol boost game.

    fitted a boost gauge to my S3 last week because it just doesnt feel as fast as it should be (bearing in mind ive never been in another S3)

    and its boosting up to 10-12 on full boost, but sometimes in 3rd it will boost up to 20psi! then drops all boost and boosts up again to 10-12psi.

    also when i hold it on mid boost it makes a hissing sound, as if there is a boost leak some where, or the dumpvalve cant hold the boost. as ive heard the standard DV being plastic is prone to failing.

    its also only reading 5 on the vacum side when on idle where as im pretty sure that should be on 20.

    if anyone could shed any light on my situation that would be ideal.

    if there is anyone in the Portsmouth/ Southampton area that could maybe take me out in there S3 or be able to give me some advice on this that would be amazing!

  2. # ADS
    Join Date
  3. #2
    3rd Gear

    Join Date
    Apr 2012
    air leak simple as that inlet manifold check hoses be easy as that



Similar Threads

  1. Boost (test) problems
    By The Stig in forum A3/S3 Forum (8L Chassis)
    Replies: 1
    Last Post: 18th November 2009, 13:09
  2. Boost/Hesitation problem...
    By Welly in forum A3/S3 Forum (8L Chassis)
    Replies: 1
    Last Post: 20th September 2009, 03:29
  3. 1.9 TDI AFN 110 boost control problem, help
    By evomaster3000 in forum Diesel forum
    Replies: 9
    Last Post: 10th May 2009, 13:32
  4. Boost Pressure Problem??
    By GarryA3 in forum A3/S3 Forum (8L Chassis)
    Replies: 4
    Last Post: 1st November 2006, 21:53
  5. boost leak problem
    By Jonesy in forum A3/S3 Forum (8L Chassis)
    Replies: 10
    Last Post: 17th October 2006, 08:39

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO