Quote:
Originally Posted by Kodename47
That's because when you're off the throttle you're not running lean, there's no fuel being injected at all. There's no combustion going on so all your engine is doing is pumping air through it, which is why your AFR is actually much higher than 20, I guess 20 is just the limitations of the sensor. AFR values are only useful when on the throttle.
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Ummm I'm pretty sure there is ignition all the time. How would the cylinder come back up after the last ignition and fight compression if for no combustion at all.