85 318i Idling Problem
I have a 1985 318i with an m10. When i bought the car for 600$ it had an idling problem like it had a vacuum leak or something. But about a month ago I replaced all of the hoses and checked everywhere for leaks. None, and still idled rough. Then I cleaned out the Idle Air stabilizer valve and the coolant temp switch and it stopped idling rough, but it idled really high, like 1500 rpm high. then yesterday it just started idling like it used to. Does anyone know what the most probable cause for this is? 02 sensor maybe?