I have a 93 eclipse 2.0 Non-turbo i finally got it to run somewhat good but the only problem i'm having is that it has high idle(1400-1600rpm) and it doesn't matter if the car is cold or warmed up. No check engine light on but i have noticed that every time i turn on the a/c rpms go down to like 1000-1200rpm but will make the engine start sputtering. what can cause this problem. i've tried playing with the biss screw but won't help.