Thread: gtp running rough tried plugs, wires, new mas air, vac. lines, just no luck

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  1. #1 gtp running rough tried plugs, wires, new mas air, vac. lines, just no luck 
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    I cant figure out my rough running gtp. I have a lean in bank 1 code 0171 i believe, i put new plugs and wires on, new mas air. , checked for vac leaks and im having no luck, I have 2.5 headers, with 3" all the way back running 3.25"pulley anyways im stuck on this Any ideas for me that be great. thanks
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  2. #2 Re: gtp running rough tried plugs, wires, new mas air, vac. lines, just no luck 
    WHERES THE LAMB SAUCE?!?! Matt Palm's Avatar
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    so you just have headers and dropped to a 3.25?
    dhp tune, sd lip, shiny stuffs, retros, gen 2 spoiler, gpo's, pregens
    http://www.grandprixforums.net/showthread.php?t=75198
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  3. #3 Re: gtp running rough tried plugs, wires, new mas air, vac. lines, just no luck 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    Do you have a code reader than can do live data or a scangauge that can?

    Check to see what your long term fuel trims and MAP in vacuum is reading.

    Sounds like it still has a huge exhaust leak or somthing internal is wrong.

    SMGPFC Member #1
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