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Off topic...GM TBI on a jeep motor...anybody???

Discussion in 'The Garage' started by k5-newbie, Sep 26, 2005.

  1. k5-newbie

    k5-newbie 1/2 ton status

    Jun 19, 2004
    Likes Received:
    Huntsville, Texas
    I have a buddy I wheel with and he wants to have a Chevy sooo bad, he has rigged up a 4.3 TBI setup on his Jeep straight 6. We got it to fire up and pump fuel but the injectors are pumping too much and we realized we had a 12V reference pulsing the injectors which is too much. Now, I believe ( and I could be very wrong here) that the injectors are supposed to see around a 10.6V reference to pulse off. Is this true and also, does anyone know a good tech article I could read to explain things a little better?

    Again, I realize this is not totally Chevy related, but I am trying to help him leave the dark side :D

    All help is appreciated.
  2. HarryH3

    HarryH3 1 ton status Author

    May 31, 2000
    Likes Received:
    Georgetown, TX
    One side of the injector is wired to +12 all the time that the key is on. The ECM supplies a pulsed ground to the other side to fire the injector.

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