Results 1 to 2 of 2

Thread: hi, newbie here with boost issues

  
  1. #1
    Status
    Offline
    mick n em's Avatar
    AOC Premium Member
    Join Date
    Sep 2009
    Posts
    64
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)

    hi, newbie here with boost issues

    hello chaps. been looking on here for a few days now, i got a zafira gsi 54 plate at weekend and on monday on my way to work noticed a flat spot at 4k which picks up again at about 4.5k.
    i've read on here about disconnecting rear BCS and vac box.
    i'd just like to know is this a common fault and fix and if so why is it so common i.e. what is failing?
    i took the car back and its been run, tested and fault codes checked with no results or faults.
    would i be ok just re-routing the vac pipes (from TB to FPR and T'd off to OE dumpvalve) or should this fault be properly diagnosed instead of being ignored?
    also if it is so popular to re-route these pipes what is the purpose for the BCS and vac box?
    any advice is welcome as i just wanna get it sorted as its fantastic to drive
    cheers, mick

  2. #2
    Status
    Offline
    Coupe John's Avatar
    AOC Obsessed
    Join Date
    Aug 2007
    Drives
    Astra 1.9 cdti xpack
    Location
    Leeds
    Posts
    2,593
    Mentioned in
    17 Post(s)
    Quoted
    61 Post(s)
    Every z20let ive driven has a flat spot at 4k, i'm sure its just the standard map which does this, if you are getting multiple flat spots then it could be a duff afm or boost sensor.

Similar Threads

  1. Boost issues
    By Kingy in forum Turbo Petrol Engines inc. Transmissions
    Replies: 18
    Last Post: 07-12-2012, 16:13
  2. Help or the GSI gets it!!!!! Boost issues!!!
    By gsibell in forum Turbo Petrol Engines inc. Transmissions
    Replies: 15
    Last Post: 06-09-2009, 21:45

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •