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This is a discussion on Congested exhaust within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Hey, My cars sick. When I let off the gas or shift at a high rpm my exhaust sounds really ...

  1. #1
    Registered User Undone10's Avatar
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    Congested exhaust

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    Hey,
    My cars sick. When I let off the gas or shift at a high rpm my exhaust sounds really congested. It sounds like it's backfiring a little bit and just all choppy. I know this explantion sucks but if anyones got any ideas I'd appreciate it.
    - 2011 WRB STI

    Cobb stage 2 tune ~ Invidia turbo back exhaust

  2. #2
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    It's called "afterfire"..... One main culprit I have found is that the car might be running a little rich.

    You have a wideband ?
    Paul

    2007 MS3

    Maintenance schedule and poke in the eyes:
    http://www.clubwrx.net/forums/genera...nce-guide.html

  3. #3
    Registered User Undone10's Avatar
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    I'm not sure what that even is but it just started doing this about a month ago and never did before.
    - 2011 WRB STI

    Cobb stage 2 tune ~ Invidia turbo back exhaust

  4. #4
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    Get your AFR's down to see if it's the problem.... Check your plugs as well. How many miles are on the car... what year, make?
    Paul

    2007 MS3

    Maintenance schedule and poke in the eyes:
    http://www.clubwrx.net/forums/genera...nce-guide.html

  5. #5
    Registered User Undone10's Avatar
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    Its a 04 WRX Impreza with like 49,000 miles.
    - 2011 WRB STI

    Cobb stage 2 tune ~ Invidia turbo back exhaust

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