Thread: Boost shows 1 or 2 bars when accelerating normally

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  1. #1 Boost shows 1 or 2 bars when accelerating normally 
    SE Level Member BigBadjohn's Avatar
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    From time to time my boost gauge will show one or two bars when Im accelerating normally. Not on the pedal or anything
    Does anyone know what could cause this and is this a problem or need tuned?
    2002 Grand Prix GTP 40th anniversary sedan
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  2. #2 Re: Boost shows 1 or 2 bars when accelerating normally 
    DUI BABY Bio248's Avatar
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    get a real boost gauge and actually see what it is doing. your boost gauge in the DIC is strictly for show and you absolutely cannot use it to diagnose problems.
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  3. #3 Re: Boost shows 1 or 2 bars when accelerating normally 
    Donating Users
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    ^^ yeah there are always people selling them on the cheap..
    2003 Subaru Impreza WRX
    2008 Saturn Aura
    2000 Bright Red GTP coupe. RIP 11/6/11
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  4. #4 Re: Boost shows 1 or 2 bars when accelerating normally 
    Bastard Reptile's Avatar
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    Quote Originally Posted by Bio248 View Post
    get a real boost gauge and actually see what it is doing. your boost gauge in the DIC is strictly for show and you absolutely cannot use it to diagnose problems.
    It is, but chances it's showing something going on. If it's showing a bar or two, it means the MAP sensor is seeing something. I've never seen it flip out for no reason.
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  5. #5 Re: Boost shows 1 or 2 bars when accelerating normally 
    DUI BABY Bio248's Avatar
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    agreed, but id rather rely on something with an actual measurement.
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  6. #6 Re: Boost shows 1 or 2 bars when accelerating normally 
    Bastard Reptile's Avatar
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    Truth. Nothing like having as many things as you can to watch.
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  7. #7 Re: Boost shows 1 or 2 bars when accelerating normally 
    Poppin 'em thangs mechguy's Avatar
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    Going uphill in overdrive will cause this. Any medium acceleration in OD will create positive boost pressure. The lower the engine speed, the more likely you will use boost. Maybe you could be more specific about saying "accelerating normally".
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  8. #8 Re: Boost shows 1 or 2 bars when accelerating normally 
    GT Level Member Tommyp2010's Avatar
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    Quote Originally Posted by mechguy View Post
    Going uphill in overdrive will cause this. Any medium acceleration in OD will create positive boost pressure. The lower the engine speed, the more likely you will use boost. Maybe you could be more specific about saying "accelerating normally".
    ya that's more of a user specific statement. Hell one of my friends with a GTP's "normal acceleration" is to fill half the boost bar.

    2006 Mitsubishi Evo IX MR
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