Car has been making a whistling noise (possibly a vacuum leak?) That appears sporadically. It was first noticed at start-up, would increase/decrease in pitch with acceleration and then disappear upon warming up. More recently it doesn't appear at start-up consistently, but occasionally will start "down the road" and can be a little louder than usual then disappear. It would be hard to diagnose at a repair shop if it's not happening at the time. What do you suggest?
Thursday, November 15th, 2012 AT 8:34 PM