My 2008 Mazda 3 (2.0) engine is running loud and very rough. on 2008 Mazda Mazda3

I know it needs new spark plugs and replace air filter but doubt they are the problem. The check engine light is NOT coming on. I have heard about engine mount problems with Mazda 3. Is this a possability? How about needing a valve adjustment? The vibrations get very bad at 50 mph and above.

by in Annapolis, MD on September 27, 2011
1 answer 1 comment
ANSWER by , September 27, 2011
the loud is most likely an exhaust leak. that leak will cause other drivability issues. fix that first then go after the rough running. it may be a motor mount but you would complain about other issues if that was the case. if you know it needs plugs why have you not changed them?? Roy
COMMENT by , September 27, 2011
I think your answer is right on. This morning I got a friend who works at a local repair facililty in Annapolis to listen to the engine and the first thing he said was have them put it on a rack check the exhaust. He also said to not have anyone touch the valves. Not causing the problem I am discussing. Will be at the local muffler shop on Friday. Having a 90,000 mile go over on Monday and that will include new sparks, filters etc.. Thank you much!