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Discussion Starter #1
i have mach z 1997 and i run the needle at the position 2 1/2 start to the top and i want to know if some of you try to put on second position or first position if they save on gas millage and it is safe for jetting for part throttle position .before i have f111 1996 and i run the needle at first position and it suppose to run at the tird they go to (12mpg to 15mpg)
 
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