spider injector upgrade installation

Discussion in 'Performance & Fuel' started by bigdave367, Mar 15, 2012.

  1. bigdave367

    bigdave367 New Member

    Hey guys! I was wondering from some of the greatest minds in GM Trucks, how difficult is it to change the injector assembly in a 99 yukon? I recently had to change my fuel pump due to the check valve not working and sluggish fuel pressure. Now, it starts rough most of the time, and sometimes it takes several times to actually run. My fuel pressure, prior to the regulator, is on the money. I strongly believe its the pressure regulator leaking, or faulty.
    So, back to the original question...
    How hard is it to change the spider injector assembly?
    And, are there any "tricks" i might need to know prior to disassembly and installation?

    Thanks for all who respond and just take the time to read!!!

  2. Boonduff

    Boonduff Rockstar 4 Years 100 Posts

    It's actually a easy job. Once the upper intake is off squeeze the tabs on each Poppit valve and they pull right out, then use 2 screw drivers to release the fuel injection manifold from it's bracket. Replace the bracket with the one that comes with the new manifold and just snap the new manifold in. Then match the fuel injector (they are labeled on the fuel injection manifold)to the correct cylinder and just push it in.

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