hey guys whats up, my car has a kind of a weird issue. When I set the timing to 6" btdc with the wire disconnected, it runs good right up until it gets warm then it surges and dies. When I set timing to 2"btdc it runs alright until it gets above 3000 rpm then the tach needle bounces around abit and theres a bit of popping when the engine comes down. does anybody know how to fix this???






91 Z28 305 B&M tranny 2500 stall, roller rockers, 3.73:1 gears, front to back exhaust, chip, afpr, hot coil