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  1. #1 Re: poor MPG after tune up 
    christopher8911
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    Default 07-12-2010
    Quote Originally Posted by 01GTP View Post
    Check the spark plugs. Check your fuel pressure regulator.
    How do I check the fuel pressure regulator?
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  2. #2 Re: poor MPG after tune up 
    TheOtherNick
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    Default 07-12-2010
    Quote Originally Posted by christopher8911 View Post
    How do I check the fuel pressure regulator?
    Was there some gas in the vacuum line connected to it? Do you have a vacuum pump? If you do put about 25" of vacuum to it and see if gas leaks out.
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