CHECK intake manifold bolts!

[J. Hakkarainen]

Can be a common problem in our engines. Had little rough cold idle and later very small whistling noise. No codes, no service light. Intake manifold bolts were VERY loose. Only tightened -didnt even check gaskets -problems gone. Can cause bigger and very expensive problems -check them today!
(Greetings from Finland. Half a meter snow. But no problem -summer is coming after 2 months. Tops down again!!)