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  1. Join Date
    May 2006
    Posts
    913
    #1
    how much does the vacuum gauge differ from a tacho meter? i mean do they totally have different functions?

  2. Join Date
    Oct 2002
    Posts
    29,354
    #2
    Quote Originally Posted by cocoy View Post
    how much does the vacuum gauge differ from a tacho meter? i mean do they totally have different functions?

    yes they are very different.

    tach - measures how fast your engine is turning
    vacuum gauge - measure the relative or absolute air pressure.

DIY: Fuel Economy Gauge for your car (to lower your car's fuel consumption)