some of the crossfires are weird,,, some of you may remember at the dragon last Oct 2011,, I was complaining that my aftermarket gps was not working,,,and that i had tried two different manufacture's gps,,,so about 10 members with there gps moved to within 7 ft. of my car and all 10 of them quiet working once i started the engine, once i shut the engine off they all worked again. jim