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Discussion Starter #1
I have a 2006 Mustang GT and the only modifications I have made are, I added a Roush supercharger and Flomaster mufflers in 2006. I now have a check engine light on and am getting the code P0456 (Evaporative Emissions System. Very small leak detected). I replaced the gas cap and still have the Check Engine Light on. Any one have any ideas?
 
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