Leave it on. I wouldn't really go around tweaking with that tuner that much... it sounds like you might do something you don't really want to.
Just in case you needed an explanation.. the EGR valve helps to recirculate your exhaust back through the combustion chamber. It helps to burn the fuel more efficiently. If your EGR valve goes bad... you'll probably lose gas mileage.. and your car will run noticeably more sluggish.
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Last edited by HokieStang00 : 05-02-2008 at 07:34 AM.
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