Closed Thread
Page 1 of 12 1 2 3 11 ... LastLast
Results 1 to 10 of 113
  1. #1
    VXRed
    Join Date
    19th November 2013
    Posts
    38

    Default Weird boost issue???

    Hi this is my first ever post and may need a bit of forgiveness. I have a 2008 corsa vxr with a weird boost problem. It sometimes boosts fine and then nothing at all, first and second don't seem to be as bad but higher gears are the worst. when in third gear for instance I put my foot to the floor and its like a non turbo car and will not boost until I lift off and then reapply full throttle , then it will boost like mad. I have replaced the MAF sensor, MAP sensor, boost control solenoid, internal dv and vacuum hoses. I have checked all vacuum pipes at the rear and they are still attached. Its running a stage 1 generic map, cone air filter and has both cats removed and I have reset preload on the wastegate to + 1 turn. This problem was there before any mods were made and its never had a dumpvalve.---Any help would be much appreciated.

  2. #2
    VXRacing ahead Matty_'s Avatar
    Join Date
    31st March 2013
    Posts
    564

    Default

    Try changing the recirc valve sometimes they stick and loose boost at 5psi

    Sent from your best ever work colleague

  3. #3
    VXRed blooded GingerJosh's Avatar
    Join Date
    28th July 2013
    Posts
    255

    Default

    Check your spark plugs/leads
    Green Burg #143

  4. #4
    VXRacing ahead Matty_'s Avatar
    Join Date
    31st March 2013
    Posts
    564

    Default

    I said that too him but he ent havin none of it lol. He said its not like a misfire. Just that the boost disappears. So recirc valve i wud of thought :/

    Sent from my GT-I9505 using Tapatalk 2

  5. #5
    VXRed
    Join Date
    19th November 2013
    Posts
    38

    Default

    I have changed the recirc valve for a forge one and it's still the same. I'll change the plugs and coil pack and will post back.

  6. #6
    VXRed
    Join Date
    4th March 2013
    Posts
    32

    Default

    i too am interested in this thread. i have stage 3 EDS map. and yes i seriously need to get it custom mapped.

    sometimes i plant foot slowly and i will boost to 18psi then drop off. if i lift off and slam hard on the pedal i spark upto 27 psi (in sixth gear) and will pull from there till it drops off higher up the rev range. from wat i see around. 27 psi is way too much so i am probably slowly killing my car

  7. #7
    VXRed blooded craig_s's Avatar
    Join Date
    28th January 2012
    Posts
    477

    Default

    What map is on it?did it do it before it had the stage 1 map on?

  8. #8
    VXRed
    Join Date
    19th November 2013
    Posts
    38

    Default

    It was doing it before the map only not as bad. I don't know what map it is but I had it done at midland remaps and have taken it back to him and he assures me that it can't be the map causing it !!!

  9. #9
    VXRacing ahead Matty_'s Avatar
    Join Date
    31st March 2013
    Posts
    564

    Default

    Trust me mine was like it if i put the car in a gear in which was too high it wouldnt go anywhere and then after around 4000-4500 revs it would boost like hell. I changed the spark plugs and coil pack and all was good

    Sent from my GT-I9505 using Tapatalk 2

  10. #10
    VXRed
    Join Date
    19th November 2013
    Posts
    38

    Default

    Ok. I've changed the plugs and coil pack and it's still the same. Arrrgh this car is driving me mad. It's a genuine coil pack and Bosch super plus plugs. I'm losing the will to live.

Closed Thread
Page 1 of 12 1 2 3 11 ... LastLast

Tags for this Thread

Posting Permissions

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