How To: 4.8,5.3,6.0 Fuel Injector Swap

Discussion in 'Engine and Performance' started by TheBrettster, Mar 4, 2013.

  1. TheBrettster

    TheBrettster Administrator Staff Member

    Messages:
    2,621
    Tools Needed:
    10MM socket
    8MM socket
    Small flat head (I used one for adjusting sprinklers)
    Petroleum Jelly ( I used unscented, didn't want my truck smelling like a used buttplug going down the road)



    First remove the plastic engine cover.

    Then remove the two 8MM bolts holding the fuel rails onto the intake plenum on each side. (Shown in Green) Then we need to relieve pressure on the fuel system by removing the test port cover (located on the passenger side, shown in red) and pushing in the valve. Note: Make sure you have a towel or rag under since gas will come out.

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    [​IMG]

    Remove the top wire loom plate which is held on by 3 10MM bolts.

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    Remove the 10MM bolt holding the front wire loom plate on.

    [​IMG]

    With both of those removed you should not easily be able to move the wire loom around and be able to lift up on both of the fuel rails, pulling all of the injectors out.

    [​IMG]

    Now to remove the plugs on the injectors themselves slide the lock up and then push in on the tab on the plug and pull out.

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    To Remove the slide locks holding the injectors onto the fuel rail I stuck the little flat head in the lock and popped them off, you can twist the injectors around if you need. Then you can just pull the injectors out. Keep in mind when you pull each injector out gas will come out so put a towel under the injector.

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    [​IMG]

    When installing new injectors make sure to lube both o-rings.

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    Then just pop them into the plenum

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    [​IMG]

    Now you can push the fuel rails onto the injectors both sides at once.

    The injector locks slide right into the little grooves on the injector and slide in with the plug facing out

    When reconnecting the plugs the lock goes on the in front of the tab that released the plugs not behind.

    Then just bolt up everything to took off and start your engine, I turned the key to on to let the fuel system pressurize for a second then turned the truck on.

    Thats it.


    Total time for me was about 30-40 minutes with people coming by asking what I was doing.
     
  2. BOO5TED

    BOO5TED Resident Smartass

    Messages:
    20,163
    :nice:

    That's how we did it on the Silvy but when we were finished I had 10 instead of 8.

    :cheeky:
     
  3. TheBrettster

    TheBrettster Administrator Staff Member

    Messages:
    2,621
    lewl wut ?
     
  4. BOO5TED

    BOO5TED Resident Smartass

    Messages:
    20,163
    The Whipple setup moves the TB to the side of the charger and a bracket with two extra injectors goes in the place of it. They only come on in WOT to keep up with the fuel needs.

    [​IMG]
     
  5. TheBrettster

    TheBrettster Administrator Staff Member

    Messages:
    2,621
    Weird why not just run bigger injectors LOL
     
  6. BOO5TED

    BOO5TED Resident Smartass

    Messages:
    20,163
    Because the system is designed to run on a basically stock motor. All that is really needed was an upgraded fuel pump and you are good up to 4psi. Mine runs around 12psi though.
     
  7. SMiGGs

    SMiGGs El Super Mod

    Messages:
    751
    fuck yeah, now i can swap injectors every month. Bad ass write up.
     
  8. Dirtmafia

    Dirtmafia Hella

    Messages:
    379
    No bolt torque specs? What a HACK... What is this? Another closely related GMXX forum? Geeze....






























    JK :crazy: Good write up B-rett
     
  9. Jared

    Jared Administrator Staff Member

    Messages:
    20,562
    Hack
     

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