Quote:
Originally Posted by l0aded
Thank you. Can you confirm something though. After looking at it more carefully my AFR goes to 20+ whenever I am in free rev (in gear moving but 0 foot on the throttle).
FWIW the car feels fine though and I haven't heard knocking after I switched my tune.
And to add to the discussion my AFR during WOT is around 12.
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Most fuel injection cars have 'fuel cut on over-run', to save fuel. It shows as 20:1 as that's the highest the oxygen sensor is calibrated for. In actual fact it's just mainly air passing through the engine, a wheel-driven air pump, to be exact!