Accord with baaaadddd idle (300-400) under load. Headlights ac or just the blower motor itself. Changed electronic load detector and IACV. New main relay plugs wires distributor battery. Alternator tested and is in working order. No CEL or codes showing. Idles at 800-900 under no load. In gear idle is eratic bouncing about 100 rpms up or down. Im at wits end with this car. Help?!?!?!

 

I had the same problem and took me months to resolve. After changing out just about everything, a guy told me it was a bad injector. I blew it off for awhile. I already had the miss located to a 1 cylinder. I swapped out injector and it was a hit. Runs great.