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This is a discussion on question on fuel economy within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; It is very common for your mpg to go down the drain if you have a bad 02 sensor....

  1. #16
    Registered User fsmwrx's Avatar
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    It is very common for your mpg to go down the drain if you have a bad 02 sensor.
    03' PSM WRX sedan - 326 awhp/303 tq

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  3. #17
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    is there anyway to check if it is bad?
    alf

  4. #18
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    is there anyway to check if it is bad? because i am not getting a CEL, but i wonder if that is because of the re-flash
    alf

  5. #19
    Registered User fsmwrx's Avatar
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    I'm sure there is, I just don't honestly know how to tell if it's bad without a cel.
    03' PSM WRX sedan - 326 awhp/303 tq

  6. #20
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    bump any other ideas??
    alf

  7. #21
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    Hey try changing the map to economy mode (if you have a accessport) I did and defintley noticed. Also try not to floor all the time and make sure you use 93 octane. I also cleaned my air filter. I am getting a lot better gas mileage about 250ish a tank

  8. #22
    Registered User yo vanilla's Avatar
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    Quote Originally Posted by 1x2
    izhazissuez,

    Have you checked for intake air leaks? If none, then, another possibility:

    Rear wings, especially, are practically worthless at less than ~130mph. It's not that they don't "work", it's that the value of the downward push on the tail of the car isn't much help at speeds lower than that. And yet, it creates drag all day long, at every speed. Solid, unadjustable wings work within a narrow speed band, the rest of the time, they just create drag and lower gas mileage. I'd never put a wing on my car, and I've driven several different makes at sustained speeds of ~ 110mph with excellent road grip.

    If it's not, this was a waste of time....

    1x2
    it's about half that speed that most normally make an effect.
    07 WRX TR | 03 mazda6
    man a whole mess of nachos sounds good right now
    ***Hawk-Eye Alliance #95*** Kachow!!

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