Thread: Depressing Fuel Economy... :(

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  1. #1 Re: Depressing Fuel Economy... :( 
    Moderator dsmuts's Avatar
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    what kind of plugs did you put in it?
    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
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  2. #2 Re: Depressing Fuel Economy... :( 
    GrandPrix Junkie
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    Quote Originally Posted by dsmuts View Post
    what kind of plugs did you put in it?
    ^^THIS^^

    These motors do not like platinum plugs, and Bosch in particular. Besides cleaning the MAF the only other thing I can think of would be the EGR. Maybe run your tires at a few higher PSI (go by the rating on the tire, not the door sticker). I usually keep mine at around 35 on my Kumho's.
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  3. #3 Re: Depressing Fuel Economy... :( 
    GT Level Member ShadowSwept's Avatar
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    Quote Originally Posted by FordMan77 View Post
    ^^THIS^^

    These motors do not like platinum plugs, and Bosch in particular. Besides cleaning the MAF the only other thing I can think of would be the EGR. Maybe run your tires at a few higher PSI (go by the rating on the tire, not the door sticker). I usually keep mine at around 35 on my Kumho's.
    I got some PP606 plugs, but I haven't put them in yet. Should I take them back? I'm getting the same milage, but I just found out the connector on my MAF sensor is broken.
    2001 Bonneville SLE - L36, Cone Filter, 200k miles
    2003 Grand Prix GT
    - L36, Short Ram Intake, HV3, Emissions Delete, ZZP 3" Downpipe, Overkill Tune, 200k miles

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