[NefCanuck]

NOS2Go4Me,Jul 10 2007, 09:25 AM Wrote:The soot in the tailpipe is, from my understanding, too rich of a tune. If you're leaning it out WITH A/F readings saying you're ok... that's good. If you're just eliminating soot by adjusting fuel trims without reading A/F, you'll eventually detonate which is really not good. I didn't know you had a wideband installed Ken.
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Interesting, because I was actually getting the soot from the get go with the car (Only really noticed when the MBRP was instaled and the shiny bits went on) but the soot problem went away when I started using 91 octane about 6 weeks before getting the Xcal 2 and now the soot is coming back again.

Maybe the stock tune was an issue from the get go? :blink:

Now one issue is the fact that my city driving contains a fair amount of short distance driving (work is less than 3km away by car) could that also contribute to the soot? If so why did using 91 on the stock tune clear it up?

NefCanuck