Quote:
Originally Posted by Pelemenii
My first thought also was that the cats are failing, but my Z is very new only 27k miles so I didn’t think it was that, as they should have a lot of juice left in them. I got the burble map with stock cats because I wanted to hear how “bad” or “quiet” it sounds as everyone always says. I was planning to get test pipes some time down the road.
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Doesn't matter if it's straight off the factory line or has 100k miles on the odometer -- running raw fuel through a catalytic convertor will cause it to stop functioning properly. The burble-and-pop mode runs raw fuel through the cats. The outcome was inevitable.