That is your idle mixture screw! Use a vacuum guage to set. Set your float level to the bottom of the site glass and use a vac guage to set your idle adj. adj till you have the highest vacuum reading and run for a while and ck. your plugs. If they are wet then you need to go to smaller jets...
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05 Saleen, 91 Mustang LX, 99 Lightning

Last edited by 05Saleen; 03-03-2009 at 10:36 PM.
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