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2026. 6. 30. 작업

증상

Mass Air Flow Expected Values

처리 내용

The 50 g/s max flow reading that you are getting is far lower than what merely altitude can explain. The chart above shows that at about 5,200 ft above sea level, the density of air is 83% of what it is at sea level (0.062 lb/cu.ft vs. .075 lb/cu.ft). So to account for the altitude, you should multiply your expected mass flow by 0.83. According to the VAG-COM diagnosis guide, which I have no reason to doubt, a 200bhp naturally-aspirated engine should flow about 160g/s of air at full-throttle peak power when at sea level. Therefore, at 5,200 ft above sea level, it should flow 160 g/s * 0.83 = 133 g/s. You're seeing 50 g/s. You're certianly not metering enough air through the MAF. This could be a MAF failure, or a big leak after the MAF.