All, I recently replaced my Catalytic converter after the check engine light came on. After looking up the prices, I bought an aftermarket CAT from carparts.com and took it to my mechanic. With labor and the cat it came to around $600 which is half of what i was quoted elsewhere. Long story short, i also replaced the plugs and a few bad coils along with the Cat. After driving 20 miles or so, the check engine light came on and it's still throwing code P0420. The mechanic checked the 02 sensors which are fine and surmised that the computer is set for California emissions standard while the CAT we installed does not. Ripping and replacing with a California emissions spec'd CAT is not an option. So, i'm considering a hack of the 02 sensors. I've seen a mechanical hack using a spacer screwed on the end of the 02 sensor and an electrical one adding a capacitor and resistor to the electrical leads that plug into the sensor. The mechanical hack is what i'm leaning towards but I've never done this before. Has anyone tried this with success and if so, can you give me some guidance on what exact parts to buy to accomplish this? Thanks in advance!!
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