Catalytic converter

Asked by Aug 26, 2011 at 04:49 PM about the 2000 Mazda MX-5 Miata

Question type: Maintenance & Repair

I have a 2000 MX-5.
95K miles on it.
Four months ago, I had to replace the original catalytic converter. It was "done."
Had a brand new cad installed
Yesterday, "check engine" light goes on.
Mechanic hooked it up to the code reader -- "catalytic converter."
Today, that rattle -- of a toasted cad -- greeted me when I started the car.
Any ideas out there as to why my care is going through cad's?

2 Answers

95

just get a delete pipe. only about $150. never have 2 worry again

335

cats fry because of too much fuel,especially aftermarket tiny ones,go back to the root problem,hell,look at the plugs,are they black carbon,or black wet,clean as a whistle? I would think not,a shorted o2 sensor,stuck injector/s,not likely,hook up volt d/c meter on o2,see how it switches on millivolt scale. thats a start.

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