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Compression test...best place to ground it.
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<blockquote data-quote="Pappy" data-source="post: 395947" data-attributes="member: 3278"><p>Actually, fuel is pulled into the cylinders by vacuum created by Bernoulli's principle. </p><p>Vacuum is produced in this case by trying to pull a high volume of air rapidly past a venturi or small opening. This low pressure on the back side of the venturi and throttle blade will readily pull fuel through the idle circuit at an idle or closed throttle setting. </p><p>As the throttle plate opens and passes over the calibration holes that make up the idle circuit the flow stops due to the rise toward atmospheric pressure. </p><p>At a WOT setting at cranking speed Bernoilli's principle pretty much goes out the window since the velocity of the air passing over the venturi will not be enough to effectively pull fuel through the idle circuit (since it is now no longer behind the blade) nor the larger column of fuel located in the fuel bowl at the bottom of the high speed nozzle.</p></blockquote><p></p>
[QUOTE="Pappy, post: 395947, member: 3278"] Actually, fuel is pulled into the cylinders by vacuum created by Bernoulli's principle. Vacuum is produced in this case by trying to pull a high volume of air rapidly past a venturi or small opening. This low pressure on the back side of the venturi and throttle blade will readily pull fuel through the idle circuit at an idle or closed throttle setting. As the throttle plate opens and passes over the calibration holes that make up the idle circuit the flow stops due to the rise toward atmospheric pressure. At a WOT setting at cranking speed Bernoilli's principle pretty much goes out the window since the velocity of the air passing over the venturi will not be enough to effectively pull fuel through the idle circuit (since it is now no longer behind the blade) nor the larger column of fuel located in the fuel bowl at the bottom of the high speed nozzle. [/QUOTE]
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Compression test...best place to ground it.
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