Thanks for reading. My 355 feels a little bit shaky when idle, although the idle indicator on dashboard looks stable (no ups and downs... it satys above 10rpm). It may not be a problem at all and probably the 355s are all the same, but I hear an air-flow-interrupted kind of sound, therefor the care shakes a bit. Spark plugs and wires were replaced and it didn´t fix it, Anyone´s input on what to look for, or where to look, is greatly appreciated. No check engine light on either by the way.
Get the throttle butterflys synchronized first. If it has not been done in a while it is a cheap service. I have heard that most do not do this with major services.Then check O2 sensors, then have the mass airflow meter checked.
