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#1 Re: p0420
SlowNA06

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04-18-2013

You need to clear the code after cat replacement and see if it comes back.

Irridium spark plugs last 100k mi and work just as well as copper. Copper is a waste on N/A and only lasts 15k mi. Don't use Platinum.
Use 195* tstat unless you can thoroughly explain why not; 99.9% don't need a lower temp.
Almost any oil filter, ever, is of higher quality than ACDelco. Spend $6+.

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