Hello everyone out here, I live in Albuquerque NM where the elevation is between 5000 & 5300 feet above sea level I own a 2006 v6 4.0 mustang that's modified with a k&n cai a flow-master series 40 dual exhaust system & I have a diablo sports predator model U-7140 tuner & I've read that you should advance the timing on a car & so I've advanced the timing on my car up to 10 degrees on the global spark adder & on the lower rpm range I advanced it up to 4% 2000 to 4000 rpm & 5% @ the 4000 to 7000 rpm & I went to diagnostics & chose live up-date & on the spark advance reading got a 30 to 34 degree reading while @ W O T & a base reading while idling between 15 degrees & 22 degrees & the reading would read higher when the cooling fan kicks on, any feed back would be great thanks!.