First off, get rid of the platinum plugs... It is criticle to performance that you use the MFG. recommended plugs...NGK's... also good plug wires, correct distributor and rotor, Honda uses two different types. The engines are tempormental if you get off the path with too many different aftermarket parts, so watch what you buy. If fuel injected, $5.00 worth of vacuum hose will save you a world of headache. Idle control solenoid, on the front of the throttle body housing, remove it, clean it with carb cleaner, let it dry and a shot of WD-40 and your idle issue should be fixed. also, if the idle runs high, the high speed idle control valve on the back of the throttle body housing needs the same treatment... there is a coolant bowl on the bottom of it that is notorious for a cooling system sludge dump. take the valve off...3-bolts... disconnect the two small cooling lines, remove the bowl from the bottom...2 screws... and clean it real good.