HKS ssq bov problem

Discussion in 'Modifications & DIY how-to' started by Mike, Mar 31, 2008.

  1. Mike

    Mike Member

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    I just bought a HKS super sequential today from fume.

    when i put it on i bolted it to the intercooler perfect and hooked the vaccum line up correctly. when i started it, it wouldnt idle. I took off the vaccum line then started it and it idled fine. I drove it down the street and it wouldn't rev past 4k rpms..

    the motor is stock and its a 2006 WRX.

    help please?
     
  2. FRCFED4

    FRCFED4 Member

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    im gonna tell you this first b4 everyone else chimes in....take it off and run the stock BPV until you have enough power to need a BOV.

    it will run shitty until you get a tune for it anyway, which is way to much to spend on a stock motor just for the whoosh noise. try going cobb stg 1 or 2 and running their intake, you can still hear it blow off and it will run perfect
     
  3. Mike

    Mike Member

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    oh ok, I just think its weird because my buddy has a stock SR 240 with the same bov and it works fine. I guess this motor is all about tune isnt it?
     
  4. FRCFED4

    FRCFED4 Member

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  5. Mike

    Mike Member

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    that cobb stuff is expensive! I might just sell the bov

    thanks for the help man!
     
  6. FRCFED4

    FRCFED4 Member

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    but ask around about cobb, its well worth it ;)
     
  7. Mike

    Mike Member

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    ok i will, is it true you can get the car tuned to have bett mpg, just wondering?

    also, if i reset the ecu this still wont help the bov problem will it?
     
    #7 Mike, Mar 31, 2008
    Last edited: Mar 31, 2008
  8. FRCFED4

    FRCFED4 Member

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    no resetting your ecu wont help with the bov

    my cobb has a map for fuel economy but i have never used it
     
  9. crashtke

    crashtke Member
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    You can't really "tune" for a bov. It is really an issue with where the MAF sensor is located, not the MAP sensor. The problem exists in that the ECU sees air go past the MAF sensor just after the intake. The location where the BOV is after the intake. On a stock engine the air released goes back into the intake tract after the sensor. If you put a aftermarket non-recirculating BOV on the car, it releases that air to the atmosphere and the ECU still thinks that it is in the intake and dumps fuel in to compensate for that air that no longer exists in the intake tract. Thus, rich conditions on shifts.

    The idle problem is most likely from the spring being too loose and it releasing air into the atmosphere.
    You should be able to tighten up the BOV spring some how and make it idle, but it will STILL have a rich condition in between shifts.

    I had a hybrid 50/50 BOV that released part to the atmosphere and recirculated part and it really was not that bad, but on the wideband O2 sensor, I was seeing conditions as rich as 8.7-9.0 in between shifts. With the stock BPV it rarely goes below 9.5 on shifts. I switched back to a modified stocker that holds more boost since I was running around 18 psi and I had doubts about the stock BPV holding that level of boost.

    But long story short, switch back and use that money to find a Cobb AP. You can get a used version one for around 150-200 if you hunt for it. Then start saving for a turbo back exhaust. There are lots of people that actually find the ebay ones to be ok and very reasonably priced.
     
  10. FRCFED4

    FRCFED4 Member

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    sorry i typed that wrong crashtke is completely correct
     
  11. Sparta

    Sparta Active Member

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    Did you plug the hose going back into the tubo inlet tube?

    even with the bov it should work, you'll probably notice the car is running a bit richer than normal though.
     
    #11 Sparta, Apr 1, 2008
    Last edited: Apr 1, 2008
  12. crashtke

    crashtke Member
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    haha, that is a simple one, I forgot to even think of that! You did plug it right....?
     
  13. nsvwrx

    nsvwrx Active Member

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    my stock holds 19 just fine.
     
  14. Mike

    Mike Member

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    yea I plugged it in.. and adjusted the screw. still didnt work right. Im just going to sell it.
     
  15. crashtke

    crashtke Member
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    Mine leaked at 17
     
  16. nsvwrx

    nsvwrx Active Member

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    weird, new gaskets? SS tuned mine and it was fine
     
  17. Matt

    Matt Think before you post
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    but Mike (not crash) is completely stock....
     
  18. Sparta

    Sparta Active Member

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    I had the hks too when I was stock and the only problem was I wasn't gettin the full boost. Come to find out the little rubber gasket that came with it disintigrated and it was leaking
     
  19. nsvwrx

    nsvwrx Active Member

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    maybe the bov is just fuxored?
     
  20. Sparta

    Sparta Active Member

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    maybe. I'm willing to meet up this week to try it out with you
     
  21. dpbgst13

    dpbgst13 Member

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    Did you use the old gasket? Its good practice to use new gaskets. But i put it to the challege and had the same problem

    dan
     
  22. Mike

    Mike Member

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    I sold it... and bought a SPT intake instead :)
     
  23. dontcallitarex

    dontcallitarex Active Member

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    *slaps forehead*
     
  24. Deke

    Deke Active Member

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