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TBI QUESTION ?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Frank, Jun 17, 2002.

  1. Frank

    Frank Registered Member

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    need help please!
    I have an 87 Blazer with a 305 motor w/TBI.
    How can I tell if the the TBI is faulty?

    The engine turns but won't start. I looked into the TBI while the engine was turning over and observed fuel dripping from the injectors down to the throttle valve. Is this normal? Or are the injectors suppose to spray the fuel down the thorttle valve?
    thanks!
     
  2. DPI

    DPI 1/2 ton status

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    Location:
    In the Burbs close to Tulsa, OK
    It may be the fuel pump not building enough pressure...I doubt the TBI would go bad.
     
  3. Thunder

    Thunder 3/4 ton status

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    Location:
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    It could be the fuel pump, clogged fuel filter, bad regulator, or fuel pump relay.
    But.
    You really need to check for trouble codes. There are a number of other things that can go wrong that will tell the computer to shut off fuel. Check the trouble codes before you go replacing a bunch of expensive parts. Then find out it was just a cheap ignition part or sensor causing the problem.
     

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