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Map Sensor Vacuum Source ?

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  • Map Sensor Vacuum Source ?

    Is there a vacuum source that would be adequate for the map sensor on the throttle body itself?

    I'm trying to mount the map sensor under the air cleaner with the vacuum line straight down. Thought it would be a good place?
    [CENTER]1994 Buick RoadMaSSter Estate Wagon LT1/4L60E. White and Woodgrain Sleeper...PCM 16188051 With SS/V4P/Custom Tune! WOT 12.9 AFR!

    1990 Chevy Suburban Silverado 5.7L 2wd ECM 1227747 HiWay Lean Cruise 18.5 MPG and 12.5 to 1 AFR at WOT!

    1972 IH 1210 Isky Cammed Balenced 345 4 speed PCM 16197427 Project!

    [SIZE=3][B][URL="http://www.gearhead-efi.com/"]GearHead-EFI.com[/URL] EFI Conversions and Chip Tuners![/B][/SIZE]
    [B]May be all you need to know about EFI![/B]

    and I still help local JustIH members (for fun) free! :cool: [/CENTER]

  • #2
    I just found this picture over on Snufulupagus site, he has so many pictures of TBI. There is a link on the links page, check it out!
    http://snflupigus.tripod.com/tbiphotos/pics.html
    Attached Files
    [CENTER]1994 Buick RoadMaSSter Estate Wagon LT1/4L60E. White and Woodgrain Sleeper...PCM 16188051 With SS/V4P/Custom Tune! WOT 12.9 AFR!

    1990 Chevy Suburban Silverado 5.7L 2wd ECM 1227747 HiWay Lean Cruise 18.5 MPG and 12.5 to 1 AFR at WOT!

    1972 IH 1210 Isky Cammed Balenced 345 4 speed PCM 16197427 Project!

    [SIZE=3][B][URL="http://www.gearhead-efi.com/"]GearHead-EFI.com[/URL] EFI Conversions and Chip Tuners![/B][/SIZE]
    [B]May be all you need to know about EFI![/B]

    and I still help local JustIH members (for fun) free! :cool: [/CENTER]

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    • #3
      MAP sensor

      There is a port on the bck of the throttle body that is the production location for theMAP vacuum source. Other than that I believe that the far left lower port on the front is manifold vacuum and should be used.

      This MUST be manifold vacuum, it MUST be leak free and MUST not have a long length of hose and/or any kinks in the hose.

      This is the brain of the unit, speed density, this is the density half of the equation.

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