Son's 1995 850 (180,000-ish miles) was running great, never had any problems in 10 years. He parked it in a garage to go out of town but at the last minute decided to move it. When he started it he said it was "very loud". Had a plane to catch so he parked and left.

I am driving over tomorrow to deal with it. The only thing I know is it was perfectly fine and literally the last time son started it the car was really loud.

Car is parked in my dad's garage. He started it and also said it is loud, perhaps like a no muffler. He drove it around and said it drives fine (that is the only time he has ever driven the car so it is not a knowledgeable opinion).

Car has been sitting since July. Battery is now dead so I can't confirm by listening over the phone.

Any idea what could suddenly fail like that? Presumably it was ok when it was driven into the garage (would have noticed "very loud" when parking in a garage) yet immediately when it was next started it was loud.

I figure I'll load all my tools into my car and head over. Understand there is little to go on by any suggestions are appreciated.

thanks,