vaccum question

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  • ScHpAnKy
    E30 Mastermind
    • May 2009
    • 1573

    #1

    vaccum question

    I don't have the booster plugged into the intake manifold, but I have it's vaccuum port blocked, do I have to plugin the booster to have it finally run?

    I've got fuel and I'm getting voltage to the coilpacks on my m50nv,
    but when I crank, I can hear it trying to start, even with some throttle applied, but nothing.

    I even plugged in a proper battery and everything is grounded, am I missing something?

    91 318i | 87 535iS
  • DesertBMW
    E30 Enthusiast
    • Aug 2011
    • 1018

    #2
    spray some carb cleaner or starter fluid in that booster port on the intake manifold and see if it will start then, don't worry about booster

    Comment

    • ScHpAnKy
      E30 Mastermind
      • May 2009
      • 1573

      #3
      forgot that vacuum won't create a fail-start, but I know I have one at the intake manifold and intake boot (intake boot is a junkyard pull) gave it some gas (don't have throttle cable hooked up yet) and it turned right over, I posted the videos of all this in my project thread (signature.)

      91 318i | 87 535iS

      Comment

      • iceman
        Advanced Member
        • Jan 2011
        • 149

        #4
        Check your idle control valve if you have to give it gas to get it started. You do not need the booster hooked up to start the engine, just make sure that the vacuum line is closed to the booster so there is not a leak.

        Also double check and tripple check your grounds

        -Engine ground
        -Ecu ground,
        -Batery ground

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