I just rebuilt my engine.306, BBK SSI intake and throttle body(it is 5 years old but never used) BBK mass air . AFR 185 heads , comp cam and roller rockers, hot coil ,headers etc. It will not idle right. As soon as you fire it up without touching the accelerator pedel it surges to 1500 rpm, then down to 500 and continues to get a little better. When I drive the car it will not stay running when I stop. As far as driving down the raod, it is very smooth and powerful.any on have any ideas?? BTW it is a 1990 lx fox 5.0