Thread: Bad mpg

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  1. #1 Bad mpg 
    SE Level Member tankrc's Avatar
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    I put on my 2007 gp SC a 57 Series FIPK kit. I have better off the line performance now. But my fuel mpg city and highway are getting lower numbers out of a tank of gas. The only thing i can fiqure out is that more air is going in so the car is putting more fuel in for a better air to fuel ratio. Anybody have ideas about this?

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  2. #2 Re: Bad mpg 
    GrandPrix Junkie machinegunsquid's Avatar
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    ^ That is true, but not to a huge extent. More than likely you're getting a little more on the gas than you used too.

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
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  3. #3 Re: Bad mpg 
    GTX Level Member blackflag's Avatar
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    your foot got heavier.
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  4. #4 Re: Bad mpg 
    Moderator dsmuts's Avatar
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    If anything you should get slightly better gas mileage because you have a new air filter on there.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  5. #5 Re: Bad mpg 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    The PCM/MAF adjust for how much air is coming in, adding the filter wont make a difference, car is still always calling for a 14.7:1 AFR when bumming around.

    I think your foots the problem here or you need a tune up. Using 91+ octane gas too I hope.

    SMGPFC Member #1
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