my problem is when the aircon is on, the engine idle is rough. sometimes the car stalls during neutral. when the auxilliary fan automatically turns on, ok naman nasa 1000 rpm yung tach reading. pero pag nag auto off, bumababa yung idling ng .400 rpm minsan lower kaya nagstall minsan pag naka neutral. pero pag nag auto on yung auxilliary fan, balik 1000 rpm ulit yung idling. pag naka-on lang naman yung aircon nagiging rough yung idling. ano kaya yung problema peeps? pls help. ride ko pala '97 exsior. ty.