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Thread: FiTech throttle body w/ GM computer?

  1. #1
    Fuel Injected! babywag's Avatar
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    FiTech throttle body w/ GM computer?

    Now that the FiTech systems have hit the market...
    Wondering if just a 4bbl throttle body could be used w/ a modified 16197427?
    Tony
    Looking to buy TunerCat OBDII
    '88 Jeep Grand Wagoneer (aka Babywag) and '90 Jeep Grand Wagoneer (aka JUNKbucket) both fuel injected
    '94 Caprice Wagon

  2. #2
    Super Moderator Six_Shooter's Avatar
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    Isn't the FiTech ECU built into the throttle body?
    The man who says something is impossible, is usually interrupted by the man doing it.

  3. #3
    Fuel Injected! babywag's Avatar
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    It is, but I have seen used and new unused systems pop up occasionally.
    More of a "what if you just had a throttle body", question.
    Supposedly they use GM sensors & injectors.
    I believe the warranty is lifetime on ECU, but only 1yr or less on other parts of system.
    Only a matter of time before more of them become available.
    Possibly in not working condition? Maybe a fried handheld tuner, etc.
    There was a brand new 600hp FiTech system on CL a couple weeks ago @$700, $995 if you buy it new.
    Tony
    Looking to buy TunerCat OBDII
    '88 Jeep Grand Wagoneer (aka Babywag) and '90 Jeep Grand Wagoneer (aka JUNKbucket) both fuel injected
    '94 Caprice Wagon

  4. #4
    Super Moderator Six_Shooter's Avatar
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    To answer whether a Delco ECM can run a 4bbl throttle body, yes it can, as long as the throttle plates are not progressive if the injectors are above the throttle plates, since there's no way to control two sets of injectors independently.

    If the injectors inject below the throttle plates than that changes things.

    You may also not need to modify the ECM to control the injectors depending on exactly what they are.

    I don't know why you wouldn't have the FiTech ECU repaired if there was a problem with it. *shrug*
    The man who says something is impossible, is usually interrupted by the man doing it.

  5. #5
    Fuel Injected! babywag's Avatar
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    Quote Originally Posted by Six_Shooter View Post
    To answer whether a Delco ECM can run a 4bbl throttle body, yes it can, as long as the throttle plates are not progressive if the injectors are above the throttle plates, since there's no way to control two sets of injectors independently.

    If the injectors inject below the throttle plates than that changes things.

    You may also not need to modify the ECM to control the injectors depending on exactly what they are.

    I don't know why you wouldn't have the FiTech ECU repaired if there was a problem with it. *shrug*
    I believe the injectors are above the throttle plates?
    Again just a what if...lots of guys like to play with things, kinda why this forum is around.
    I've seen posts about 4bbl throttle bodies in past, but seemed there weren't any real good options, maybe that'll change now?

    From a tuning aspect reading online threads and their documentation it appears the fuel & spark tuning is pretty lacking.
    Tony
    Looking to buy TunerCat OBDII
    '88 Jeep Grand Wagoneer (aka Babywag) and '90 Jeep Grand Wagoneer (aka JUNKbucket) both fuel injected
    '94 Caprice Wagon

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