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Whats the purpose of a vacuum gauge?


MIBPreacher

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I have bought tools at garage sales that I still do not know what they are for but provide wonderment and entertainment for me. Just watching that vaccum gauge needle pulsating going up and down must be a comfort and worth the expense...great vaccum readings....you need a liquid filled fuel pressure gauge, compass and mirror mounted level.

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So that’s how that BMW mpg gauge works! That explains why it swings wildly between full-throttle blips going uphill, and shifting into neutral. It’s so annoying on my 1992 325 that seriously considering masking it with tape.

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So that’s how that BMW mpg gauge works! That explains why it swings wildly between full-throttle blips going uphill, and shifting into neutral. It’s so annoying on my 1992 325 that seriously considering masking it with tape.

 

yea mine did that too. i thought it was attached to the throttle somehow because any slight movment of the gas peddle would send it up or down. i tried going by it and adjusting my foot to get it near 30mpg and got 28. i was pretty suprised to get 28mpg from a bimmer with 300,000 miles.:burnout:

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