Just last week I start my car and the engine idle "feels" rougher.
Its a 2001 with 24k miles. I've searched through some of the past VANOS postings and can't say that I would classify the symptom as a diesel sound. No SES light. No oil on the floor. The roughness almost completely goes away when the engine is warmed up but I still feel a certain roughness in the engine. I drive the car often enought to pick up changes like this and believe me, there has been a difference in engine roughness that was not there the week before. Oil is darker than I am used to seeing (5k since last oil change, I requested the special 40/60 weight, no oil usage to speak of) After hanging out on this forum for awhile a VANOS problem is first thing I thought of, but tell me it isn't so
I'm curious as to how exactly would a VANOS problem or an impending VANOS problem would be diagnosed. By sound only? Would a fault code be triggered or stored without the SES light going on? The car needs to go in, but I want to armed with more information in case I get a SA that dismisses the problem offhand.....
TIA for your input
