1999 Honda Accord cat converter broken up inside,rattleing

1999 HONDA ACCORD
120,000 MILES • 4 CYL • FWD • AUTOMATIC
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LORIDERJS
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The check engine code said improper caytlist. MY gas mileage is down to 20MPG. There is no backup in the exhaust that I can tell. I have removed the resanator and also replaced the stock muffler with a flowmaster 40 series. Will replaceing the cat converter restore my lost MPG's and take away the check engine light?
Jul 25, 2008 at 12:48 PM
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RASMATAZ
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1999 Honda Accord cat converter broken up inside,rattleing=obviously its defective, replace it-then have the oxygen sensors checked out and make sure the exhaust is not leaking.

When was the last time you tune-up?
Jul 25, 2008 at 12:53 PM