for some reason after i changed my sparkplugs to bosch super plus for the 1.6L vtec ones for my 95 civic ex coupe, the idle went bad and jumps from 1500-2000 everytime i start up the car. after driving, and i put the car in neutral, the car idles 1000-1500 when the engine is hot.

basically...the engine idle is surging when it is in gear, but when its not, its not surging...someone please help? and my engine light is on, but my is obd1 so i cant get a engine code scan on it. i have to do it the hard way..-__-