I am new to this and have a few questions. 1st off I am getting about 25-28 miles to the gallon. My check engine light is on and they told me is was catalytic converter and the dealer said $900 to fix. I now have a raw egg/sulfer smell coming from the exhaust. Is this also due to the catalytic converter? I know I need to get this fixed but I am not spending $900 for it.

Also... My radio is messed up. I turn the car on and the bass is all the way up and when you go to turn it down it says +f and it doesnt move up or down, but when you switch it to AM it will let you change the setting and when you flip it back to FM the bass is now down. What in the woerld could this be?

and last... I bought a cd player for the trunk a 6 disc. it has worked for 2 years and now will not play a cd at all. It reads no disc and skips to next disc which says the same thing. Anyway to fix all of these problems?