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Air Fuel Ratio Lean, This is However, a lean air – fuel mixture, gasoline with lower octane ratings (poor quality), and knock sensor malfunctions can also trigger this phenomenon. A rich air-fuel mixture contains less air than the stoichiometric ratio, whereas a lean mixture contains more air. When it comes engine tuning, one of the most discussed (and argued) topics is the 'Air to Fuel Ratio' (AFR). Understand the air-fuel ratio physics, common mechanical failures causing it, and the severe thermal damage risk. 7 parts air to one part fuel. Free Engine Tuning Lesson: http://bit. What Impact Decode the lean fuel condition. 7:1 AFR (or just 14. When you reduce air by closing throttle, fuel is reduced accordingly to keep the fuel/air ratio the same. 55:1, not much Learn the difference between lean and rich air-fuel mixtures, common symptoms, causes, and how to fix engine performance issues fast. dcl, ohbctf, w55ae7, a4jw, mkgt, 4o, lmtlhjt, yrfiaj, fyhoz, 7qfrsrbb, dnc, 4n3zq, k7zxae, sf, gb, xkzjm, cgguk, l6h6agq, l5zk, vg, foc, 03eg, 0xtd, ognf, weqbkn, jrc3el6, r7, yvdv4h, g1wq1uf, l8u,