Catalytic Converter

[mavrick420]

Originally Posted by justinius7 Is it possible that i have an oxygen sensor or some sensor that is not working properly, if so is there a way to check for fault codes, or does that have to be done at a shop. Also, if I buy a 2.5 inch magnaflow cat and have it installed will it make a huge diff? thanks!

You can check you O2 sensor but you need an ossilliscope (or factory scan tool), all you do is watch the wave form, if the O2 sensor is good you will see the voltage increase and decrease, if stays at one voltage value or moves very little the O2 sensor is not responding.
And buying that cat would help a lot.