I love how people laugh at me when I do this, until you show them and have them try it and they see it actually works. I also have no clue as to why this works but it does.Hold it tightly to your chin when pressing the button. Not sure of the reason but it works better. I've heard that you end up using your head as an antenna. Hey, better that than a hat rack, eh?
Without upgrades you can't. It sucks, funny thing is some members on here think the range is good! Not I....anyone come up with a way to improve range of factory remote start??