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  • Varied EFI Questions

    After lurking here for several days and reading alot of great info on gm efi, I have a couple of questions that I have not been able to find answers for.

    1. In Painless Performance wiring manual (http://www.painlessperformance.com/m...htm#90503Start section 6.2.2) for their efi installation, they say the MAP sensor must always be installed "vacuum nipple" down. Why is this? Or does it really matter?

    2. Will the GM water sending unit fit in the IH manifold in the stock location?

    3. On the end of the knock sensor, there seems to be a hose connection, where does this hook up in the grand scheme of things?

    4. Where do you locate the knock sensor? the head?

    5. What is "EST"?

    Thanks for all of the help and info,

  • #2
    Re: Varied EFI Questions

    Originally posted by Jeff Eggemeyer
    After lurking here for several days and reading alot of great info on gm efi, I have a couple of questions that I have not been able to find answers for.

    1. In Painless Performance wiring manual (http://www.painlessperformance.com/m...htm#90503Start section 6.2.2) for their efi installation, they say the MAP sensor must always be installed "vacuum nipple" down. Why is this? Or does it really matter?

    2. Will the GM water sending unit fit in the IH manifold in the stock location?

    3. On the end of the knock sensor, there seems to be a hose connection, where does this hook up in the grand scheme of things?

    4. Where do you locate the knock sensor? the head?

    5. What is "EST"?

    Thanks for all of the help and info,
    I'll take a stab.
    1. Only reason I can think of is to allow any moisture that may condensate in the sensor a way of exiting the sensor. (total stab in the dark here).

    2. Hmmm, don't know yet. I still need to pick one up.

    3. It looks like a hose nipple but it is really a wire connection. The wire connector has two fingers that snap over that circular ring on the knock sensor to lock it in place.

    4. Thread it into the block drain port on the right side of the block. This is where you will find them on the GM engines.

    5. Electronic Spark Timing

    Comment


    • #3
      Re: Varied EFI Questions

      Originally posted by Jeff Eggemeyer
      After lurking here for several days and reading alot of great info on gm efi, I have a couple of questions that I have not been able to find answers for.

      1. In Painless Performance wiring manual (http://www.painlessperformance.com/m...htm#90503Start section 6.2.2) for their efi installation, they say the MAP sensor must always be installed "vacuum nipple" down. Why is this? Or does it really matter?

      2. Will the GM water sending unit fit in the IH manifold in the stock location?

      3. On the end of the knock sensor, there seems to be a hose connection, where does this hook up in the grand scheme of things?

      4. Where do you locate the knock sensor? the head?

      5. What is "EST"?

      Thanks for all of the help and info,
      1. never seen it mentioned like that and I know the ones in the junkyards I have pulled were not all facing down.

      2. The temp sending unit will screw right into the side of the thermostat housing. I leave the stock one in place for the gauge.

      3, 4, 5 as Torc stated.
      Bill USN-1

      COMMITED TO TEACHING PEOPLE THE "PROPER" WAY TO EFI
      HAMILTON FUEL INJECTION
      May be the answer to all your fuel injection needs!
      Learn to do it right.

      Comment


      • #4
        Thanks Todd & Bill.......

        for the info. I will be heading to the "mall" to do my shopping for the EFI Parts. I stopped by and visited with a friend of mine at Autozone and we pulled several dist parts and pieces and checked them against the prestolite disty. Shouldn't be too hard to get one together. Will know more tomorrow.

        Jeff

        Comment

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