June 19, 20241 yr comment_183816 Det är en vakum indikering som skall hjälpa dig köra mer bränsleekonomiskt. (The vacuum shown on the gauge is the difference between atmospheric pressure and cylinder pressure, or how much inches in mercury below atmospheric pressure. Atmospheric pressure is about 30 in-Hg at sea level, so a reading at idle of -19 in-Hg means the pressure in the cylinders is 11 in-Hg.)
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