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Buy and Sell Cars, Parts, Services and more. Ranging from New to Used to Aftermarket products for free. Car and Parts Dealers are now welcomed.
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hi,

at idle the vacuum gauge stays at 21 mmhg but when aircond is switched on, it dropped to somewhere around 16 mmhg

is this normal? if it is, can someone explain how running on aircond at idle decreases pressure drop inside plenum?
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