Quote:
Originally Posted by tirwin
Started running very lean. 20% duty cycle. Idles rough.
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Does it stink?
I always struggle with this but I think that with a 20% duty cycle the signal from the O2 sensor is saying it is too rich. The frequency valve is being instructed to lean the mixture out to compensate.
I think I remember that psalt says to set it around 35 duty cycle which is a little rich. The Lambda system will compensate and bring it to stioch in closed loop (dithering) but when you got to WOT you have a bit of extra fuel as the Lambda system is disabled.