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TBI woes

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

  1. clarkjw24

    clarkjw24 1/2 ton status GMOTM Winner

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    Well I can't figure this thing out. Its still cranks and idles but dies once its put in gear. Also has a backfire. I've noticed that the pass injector is wet around the plug were as the drivers side is dry. Both seem to be pulsing the same into the TB. Its not throwing any codes now. Could someone help me please. Could the ecm be bad or maybe the tb regulator?

    I have replaced the following in the last couple of weeks.

    Plugs
    Wires
    Coil
    Air Idle controll
    Map
    Fuel filter
    Fuel pump
    New sock
    Distributer Cap
    Rotor button
    O2 sensor
     
  2. ryan22re

    ryan22re 1/2 ton status

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    sounds like maybe the only thing left is the regulator.

    ryan
     
  3. clarkjw24

    clarkjw24 1/2 ton status GMOTM Winner

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    Where do I get one? How hard is it to change and what do they cost? Thanks
     
  4. ryan22re

    ryan22re 1/2 ton status

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    might have one in stock here at the stealership.

    give me a minute to check.

    ryan
     
  5. ryan22re

    ryan22re 1/2 ton status

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    nope dont have on in stock.

    gm # 17112399

    cost (employee) about $74 plus tax.

    is very easy to change.

    ryan
     
  6. clarkjw24

    clarkjw24 1/2 ton status GMOTM Winner

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    :eek1:
    I believe I'll just get another complete used Throttle body. Thanks ryan. Got a one coming from a guy on here.
     
  7. ryan22re

    ryan22re 1/2 ton status

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    yeah the aftermarket adjustable ones are cheaper than the gm ones.

    ryan
     
  8. ryan22re

    ryan22re 1/2 ton status

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    have you checked the timing?

    just wondering

    ryan
     
  9. clarkjw24

    clarkjw24 1/2 ton status GMOTM Winner

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    Yeah I've got a digital T.L. and its set exactly where I had before when it was running right.
     
  10. unclematty

    unclematty 1/2 ton status

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    Have you checked the fuel pressure? TBI should read around 12 to 15 PSI when running, and not loose any more than a pound or two under acceleration, low fuel pressure causes all sorts of weird problems.
     
  11. clarkjw24

    clarkjw24 1/2 ton status GMOTM Winner

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    I didn't have a way to check the pressure thats why I just bought a new fuel pump and checked all the lines for kinks and bends.
     

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