Check Engine light comes on when accelarating hard.
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This is a discussion on Check Engine light comes on when accelarating hard. within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Ever since I went catless, my CEL will pop on when i accelerate hard, when it happens it feels like ...

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    Registered User jmb8806's Avatar
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    Check Engine light comes on when accelarating hard.

    Ever since I went catless, my CEL will pop on when i accelerate hard, when it happens it feels like the fuel cuts out, it seems to happen between 80 and 85 mph. The light stays on, but after a few starts it clears itself. any suggestions???

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    He simply abides. SD_GR's Avatar
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    Post the code, post a list of mods done to the car, and see if someone can help.
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    Registered User jmb8806's Avatar
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    my mods are
    spt catback
    HKS catless DP
    spt intake

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    Registered User lytlec's Avatar
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    Quote Originally Posted by jmb8806 View Post
    my mods are
    spt catback
    HKS catless DP
    spt intake
    I would guess you need a tune....when I put my turbo back exhaust on this same thing happened to me...then I got it tuned and it has never happened since...

    Wait...do you have an 06/07 with a catless downpipe...if so..get tune NOW!
    Last edited by lytlec; 02-04-2010 at 01:14 PM.
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    Registered User PREracing's Avatar
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    overboosting most likley.....common thing when going catless on 06 and up wrx. I too recommend a tune
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    Admiral Ackbar mycologist's Avatar
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    Get a stage II map or tune ASAP (as said above). You can't run the car hard safely as it is now.

    If that doesn't fix it get a DP with a cat and/or get an external wastegate.

    This thread assumes you have a stage II map:
    Boost creep / fuel cut
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    Registered User jmb8806's Avatar
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    ok so i got an AP and tuned to stage II and im still getting the same results the code is a P0244...im guess the next step is to get an external waistgate?

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    Registered User mudferret's Avatar
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    Quote Originally Posted by jmb8806 View Post
    ok so i got an AP and tuned to stage II and im still getting the same results the code is a P0244...im guess the next step is to get an external waistgate?
    CobbTuning.com - Service Bulletin: 07 WRX/STi Overboosting with Catless Exhaust

    Edit: my super sleuth skills indicate that you have an 06, but it's likely that the same applies to you going by a quote from their site:
    Please note: The catted version is recommended for the 2006-07 WRX, due to possible boost spiking while running catless
    Last edited by mudferret; 02-19-2010 at 12:39 PM.
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    Registered User jmb8806's Avatar
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    i have an 06....

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    Registered User mudferret's Avatar
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    Edited prior to your reply, they mention the 06 as well. Lots of threads here and elsewhere discuss the issue.
    ...Rob.
    MMVI WRX - VF43 Airboy Tuned @ 3500'

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    Registered User jmb8806's Avatar
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    where is the waist gate located

  13. #12
    Registered User mudferret's Avatar
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    There's a picture in the link...

    Here's some more reading: CobbTuning.com - How Subaruís Factory Boost Control System Works
    ...Rob.
    MMVI WRX - VF43 Airboy Tuned @ 3500'

  14. #13
    Registered User jmb8806's Avatar
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    so do u think that getting a catted DP is my most deffinate way of fixing my problem then

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    Supporting Member mjboudreaux77's Avatar
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    Quote Originally Posted by jmb8806 View Post
    so do u think that getting a catted DP is my most deffinate way of fixing my problem then
    I have read that leaving the stock catback can take care of the problem. Assuming you still have it around, this might be your cheapest and quickest solution. I believe all you need is a little bit of back pressure which the stock catback will provide.
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    Registered User jmb8806's Avatar
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    yeah but wont i loose some power then?

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