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weird turbo pressure

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    weird turbo pressure

    i just noticed my boost pressure gauge is showing the boost climb and descend slower than before. i have just replaced the line on top of the hose on top of intake manifold. the tiny one by where it says turbo. i believe it is a black hose with a red line. i usually have a reading of 20 in the inhg area. now it reads about 18. could something else be going on here?

    #2
    i just looked it up and the tube im talking about goes to the distributor vacuum control diaphragm. could that cause what i'm talking about?

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      #3
      I had a problem with my vac advance. The diaphram had a tear in it and it was leaking boost and causing my car to ilde rough. I bought a new one at rockauto.com for $25 with the shipping.

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        #4
        Is your blow off valve working correctly?
        Mazda
        1988 Black 323 GT
        DOHC 16 VALVE TURBO

        2013 Velocity Red Mica Mazdaspeed3

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          #5
          i hope so. i will check.

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