88E24Problem

I have a 88' 635csi and when i star the car it idles up and down between 500 and 1000, i bought three idle control valves and those don't seem to be the problem, i unplugged the idle control valve and it idles fine until i put in gear, when i put it in gear it idles up and down between 500 and 1000, it also will try to bog out and you have to catch it at a certain point to press the gas because if you don't the engine will bog out,, and when i put it in gear (like all cars) it goes forward slowly but when it starts idling wrong the car will stop and go, i have no idea what the problem could be, just was looking for some help,, and i was also looking into some clear corner lights if anyone knows where i could get any.