Need help with my 05 wrx stutter/hesitation please!
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This is a discussion on Need help with my 05 wrx stutter/hesitation please! within the New Member Hangout forums, part of the Community - Meet other Enthusiasts category; I am having what seems to be a somewhat common problem with stutter/hesitation in the 3200 to 3500 rpm range ...

  1. #1
    Registered User
    Join Date
    Mar 2014
    Posts
    4

    Need help with my 05 wrx stutter/hesitation please!

    I am having what seems to be a somewhat common problem with stutter/hesitation in the 3200 to 3500 rpm range when boosting, once I clear the 4000-4500 rpm range it is running great. I have done a ton of research on forums before posting but have not come to a conclusion because either nobody posted a final remedy or have a cel. Basically when driving normal there are no issues and when I ease the throttle to higher rpms no issue as well, its when i get on it at wot. As soon as I hit boost it stutters in 1st, 2nd and 3rd gear. It IS running rich, I am getting a faint fuel smell with quite a bit of backfire in deceleration and sometimes will get a loud single gunshot sound. I have replaced the plugs, fuel pressure regulator along with vacuum lines, fuel pump gasket, maf sensor and injectors checked for leaks and had 02 sensors checked. I am running out of money and getting extremely irritated with this issue. Ugghhh! I am listing my performance related mods below. Any advice or help is very much appreciated. Btw, I do not have a data log or accesport to make things easier.

    1. 16g precision turbo
    2. Greddy profec spec b 2 boost controller, type s bov
    3. Perrin front mount intercooler, fuel rail kit, catless up/down pipe, oil catch can
    4 Magnaflow cat back exhaust
    5. K&N intake
    6. Walbro 255 fuel pump
    7. STi pinks
    8. Exedy stage 3 clutch and flywheel
    9. NGK one step colder plugs
    10. Open source tune by the boost creep in colorado

    (I am also getting the wastegate flutter after shifting as well.)

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  3. #2
    Registered User
    Join Date
    Aug 2013
    Posts
    1
    Hi 7 DS

    I'm have the same issue
    It may not be the answer you are looking for and it may not be correct.
    I think it is a lazy waste gate actuator.
    Does it make a odd whine while it's hesitating?

  4. #3
    Registered User
    Join Date
    Mar 2014
    Posts
    4
    No whining at all, just the sound of the engine lagging or stumbling.

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