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After all this time we've come to find my engine has been sending oil through the cats and the cats are all clogged up. I know straight piping the cats in california is illegal, but does anyone have any idea how loud it will becomes if I do this? Also, what kind of performance problems will I...

Greetings, Recently I ran into some trouble with my 2003 MP5. Car seems to run normal at lower RPMs (500-4000), although it may not be running perfectly. I simply can't tell. The real problem hits when I start to rise in RPM. Since this car is only a 4 speed automatic, it makes my car really...

My alternator belt was squeaking from the A/C, but I fixed that problem. This is more of a honking or slightly kind of like a low pitched moaning? It is very loud and unnerving.

Hey all you people! I'm new to this forum... first post. Seems to be that there is a lot of information and support from other owners here so I figured I'd take my part in it as well. I purchased my Mazda Protege5 in March this year with 147k miles and after buying it discovered a noise that...