2005 Volvo S60 Q&A

2005 Volvo S60 Question: Car engine very loud. Muffler checked and it is not that. What else could it be?

It started a while ago and does it all the time. It does not have the pick up that it used to have. I don't want to hurt the car by driving a lot. -
Answer 1
Are all the spark plugs still in the engine? (Verify visually). Or as most do , lately , post a useless question and don't bother replying. Just keep driving it , I'm sure it is not serious......yet. -