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TBI swap help! Please.

Discussion in 'The Garage' started by clarkjw24, Feb 15, 2005.

  1. clarkjw24

    clarkjw24 1/2 ton status GMOTM Winner

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    TBI swap help! Please. Need TBI GODs

    I'm swapping in a tbi setup into my K5. I've got an 84 desiel silverado fuse block. I'm using the firewall back harness from an 87 Silverado K10. I've got 5 wires on the outside row that will not meet a connector in the fuse block. Could someone please help me identify these and how to hook them up. I've got picks of the wires and pics of some plugs that I don't know where to hook. I bought the whole 87 truck but used the fuse block in another K5.
    [​IMG]
    Pink and white
    Orange
    Brown
    Brown and white
    Dk Brown
    [​IMG]
    Plug on pass side of block
    [​IMG]
    Do I need this off of the old block
    [​IMG]
    is this brown and white wire a ground?
    [​IMG]
    I've got no where to plug this two wire plug

    Could someone please help me.
     
    Last edited: Feb 15, 2005
  2. loafer

    loafer 1/2 ton status

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    pictures two and three are the knock sensor plug and knock sensor. You don't have to use it, but it's nice to have.

    Pictures four and five is the coolant temp. sensor. You'll need to find a place on your manifold to install the sensor, as this ecu uses the sensor to determine the propper enrichment for cold starts and is used to set the idle speed.
     
  3. clarkjw24

    clarkjw24 1/2 ton status GMOTM Winner

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    I've got the coolent plug hooked up in pic 4 but was wondering about the brown and white wire sticking up. I think it may be a ground? Pic 5 is another two wire plug that reaches only to the base of the tb. Maybe it went to egr or smog stuff which I'm not running. I'll grab the knock sensor off of the old block and hook it up.
    Anyone on the five wires in the first pic and do they need power?
     
  4. clarkjw24

    clarkjw24 1/2 ton status GMOTM Winner

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    Any more info for me guys?
     
  5. clarkjw24

    clarkjw24 1/2 ton status GMOTM Winner

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    TTT for the night wizards.
     
  6. Russell

    Russell LB7 Tahoe Status Premium Member GMOTM Winner

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    Brown and white is ground on my TPI setup. I'll have to find a TBI wiring diagram to see if I can help with the rest. Don't hold me to this, but I think that two pole connector with the orange weather seal is for the electric fan... There are a number of other things it could possibly be though, an emissions connector (air divert, air select, canister purge, egr etc) MAT (manifold air temp) sensor, or something like that.

    The easiest way to help us help you is to let us know what service number your ECM is, and where those wires in the fuse box are coming from / going to.
     
  7. dyeager535

    dyeager535 1 ton status Premium Member

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    Do a search for one of my posts regarding TBI fairly recently. I wasn't the original one to post it, but some TBI wiring schematics are reference by me in it.

    Last plug pic is something like EVAP, AIR, or EGR solenoid.
     
  8. clarkjw24

    clarkjw24 1/2 ton status GMOTM Winner

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    Thanks a million. Found the webshots link to the schematics. That should do me.:xmas:
     

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