civic sleeper

right now i have an open header n when i started it up n it runs like crap it doesnt keep idle it idels at 100 n floats up n down (im using the civic t cable n its a little loose?) n thats basicly it its a 92 civic with a 95 teg swap any help would be great and if anyone can tell me the grounding points on the motor aswell that would be great (right now i have the one from the valve cover ttf n the tranny ttf ) maybee this is the problem ???? n i when its ideling the lights are dim n get brighter with more rpm's

cartuner

is it doing this when it's cold only or even when it warms up? Check for IACV (Idle Air Cintrol Valve) and possibly ECT(Engine Coolent Temp.) sensor. My brother's car did this only when it was cold and when it warmed up it idled fine. ECT was the problem.