Page 1 of 3 123 LastLast
Results 1 to 10 of 24

Thread: missfire when going into boost

  
  1. #1
    Status
    Offline
    coupeturborsa's Avatar
    AOC Regular
    Join Date
    Jul 2008
    Location
    South Africa
    Posts
    132
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)

    missfire when going into boost

    hey guys. my car has a very bad misfire when i put it down hard from 1st gear. it does not do it all the time. it also does it sometimes if i drop into 3rd gear from 4th or 5th. once it gets going it holds boost with no problem.

    what could be causing this ?
    new vxr turbo was fitted abt 1month ago.
    2002 ASTRA COUPE TURBO - PH3.5
    352 bhp and 370ft lb


  2. #2
    Status
    Offline
    mania's Avatar
    AOC Fanatic
    Join Date
    Sep 2008
    Posts
    437
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Have you tried checking/changing the spark plugs? Seems to be the most common fix for misfires..

  3. #3
    Status
    Offline
    Enkidu's Avatar
    AOC Obsessed
    Join Date
    Feb 2006
    Posts
    2,716
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Its either 2 things, plugs or coilpack.
    Arden Astra GSI - Phase 3.5

    EDS Phase 3.5 288 BHP 340 FT/LB

    Inlet cam and Dbilas manifold.

  4. #4
    Status
    Offline
    coupeturborsa's Avatar
    AOC Regular
    Join Date
    Jul 2008
    Location
    South Africa
    Posts
    132
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    changed plugs yesterday. its not a constant missfire, no idle dip. its only happening in 1st and 3rd gear.
    no error codes coming up. but the management light just flashes if i try the acc, brake thing.
    2002 ASTRA COUPE TURBO - PH3.5
    352 bhp and 370ft lb


  5. #5
    Status
    Offline
    ZAF_GSI's Avatar
    AOC Obsessed
    Join Date
    Nov 2007
    Posts
    2,933
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Quote Originally Posted by coupeturborsa View Post
    changed plugs yesterday. its not a constant missfire, no idle dip. its only happening in 1st and 3rd gear.
    no error codes coming up. but the management light just flashes if i try the acc, brake thing.
    Count the flashes mate
    PHASE 3 ON A SWITCH WIV A GARRETT

  6. #6
    Status
    Offline
    coupeturborsa's Avatar
    AOC Regular
    Join Date
    Jul 2008
    Location
    South Africa
    Posts
    132
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    ok so its 10 flashes then 3 then 4.

    i do not know how to read the error codes with the flashes.
    someone please help out.

    thanks.
    2002 ASTRA COUPE TURBO - PH3.5
    352 bhp and 370ft lb


  7. #7
    Status
    Offline
    Toms1989's Avatar
    Soft Top VTEC :)
    Join Date
    Dec 2007
    Posts
    11,356
    Mentioned in
    0 Post(s)
    Quoted
    1 Post(s)
    10 flashes = 0
    1 = 1
    2 = 2

    And so on and so forth

    you get 4 series of flashes, each flash has a pause in between them, and those 4 sets of flashes equate to a code, then if there is more codes, there will be a long pause in between them

    Hope this helps
    FULL Black Leather Heated coupe interior for sale! £200!!!
    Click Here

  8. #8
    Status
    Offline
    coupeturborsa's Avatar
    AOC Regular
    Join Date
    Jul 2008
    Location
    South Africa
    Posts
    132
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    thanks.

    so i found all of the below.

    0340.

    P0340 engine speed error '
    P0340 camshaft position donor dysfunction C-009
    P0340 camshaft position encoder signal to big C-009
    P0340 camshaft position encoder signal to small C-009
    P0340 camshaft position encoder circuit open C-009

    will this cause the car to missfire ??
    2002 ASTRA COUPE TURBO - PH3.5
    352 bhp and 370ft lb


  9. #9
    Status
    Offline
    Enkidu's Avatar
    AOC Obsessed
    Join Date
    Feb 2006
    Posts
    2,716
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Possible cam sensor?? looks like it..... Thats the sensor on the left on the rocker cover on top of engine.
    Arden Astra GSI - Phase 3.5

    EDS Phase 3.5 288 BHP 340 FT/LB

    Inlet cam and Dbilas manifold.

  10. #10
    Status
    Offline
    coupeturborsa's Avatar
    AOC Regular
    Join Date
    Jul 2008
    Location
    South Africa
    Posts
    132
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    yeah will check it out today.

    thanks guys.
    2002 ASTRA COUPE TURBO - PH3.5
    352 bhp and 370ft lb


Page 1 of 3 123 LastLast

Similar Threads

  1. Missfire under boost
    By tazman112 in forum Turbo Petrol Engines inc. Transmissions
    Replies: 4
    Last Post: 17-04-2008, 00:22
  2. missfire on boost
    By gsi-jay in forum Turbo Petrol Engines inc. Transmissions
    Replies: 9
    Last Post: 19-12-2007, 22:07

Posting Permissions

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