Hey Guys, I just recently bought a Mazda 323 GT Turbo (88') and I found a little problem. When I drive the car for a little while until it gets warm it has an rough idle. Normally the idle rpm is around 1000 rpm but sometimes the idle rpm goes to 500 rpm, even stalling without me doing anything. This just happens randomly. Sometimes when I just turn the car off for shopping and start it back on it has this problem. But when later, when I let it idle at a red light it didnt have any problems. Does anybody know a fix ?