How To Remove and Install Fuel Injectors

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 2 of 2
Cadillac Tech Tips - How to fix it Discussion, How To Remove and Install Fuel Injectors in Item Specific Cadillac Discussion; This post is a step by step procedure on how to remove and install your fuel injectors on Cadillac Northstars ...
  1. #1
    fpmesiIII's Avatar
    fpmesiIII is offline Cadillac Owners Fanatic
    Automobile(s): 1996 Cadillac Seville STS (167k)
    Join Date
    May 2005
    Western NY

    How To Remove and Install Fuel Injectors

    This post is a step by step procedure on how to remove and install your fuel injectors on Cadillac Northstars this was done on a '96 N*

    1. remove the negative battery cable. (red)
    2. take off beauty cover, (big plastic grey cover that has 4 nuts)
    3. relieve the fuel system pressure.
    4. remove the front four spark plug wires (easier to work on injectors)
    5. remove fuel pressure regular connector to fuel rail (rubber mouth)
    6. remove any other hoses that are in the way, there are two others that i removed to make room for working, one connected to the oil cap and the other was in the back of the engine both connections for these two hoses connected near the air intake mount
    7. remove the injector electrical connector (i believe there is a clip that you pry off with a flat head screw driver)
    8. take off bolt/washer giving fuel rail better support (by EGR and intake area)
    9. pull up on the fuel rail, all 8 fuel injectors will pop out of the intake manifold
    10. spread the injector retainer clip to release injector from fuel rail.
    11. pull injector(s) out of fuel rail (they can be difficult, just twist and turn and pull and they should loosen them up)

    Install procedure

    1. lubricate the new upper and lower injector O-rings with clean engine oil and shove injector back into fuel rail. (again twist and turn and pushing up into the rail hole, I found works the best)
    * ensure injectors are aligned by orientating electrical connector perpendicular to crankshaft
    * push in far enough to engage the retainer clip with machined slots on rail socket
    2. Install the new retainer clip onto injector
    3. Snap the fuel rail down onto intake manifold
    4. put back on nut/washer to put more pressure on fuel rail
    5. Install the injector electrical connector
    6. snap back on clip to hold electrical connector in place
    7. Install the two tubes/hoses that were removed earlier
    8. plug wires back into front four holes
    9. put back on nut/washer to put more pressure on fuel rail
    10.1 turn the ignition switch to On position for 2 seconds
    10.2 turn the ignition switch OFF for 10 seconds
    10.3 Turn the ignition switch ON
    10.4 Check for fuel leaks
    11. Install the beauty cover
    12. Install the negative batter cable

  2. Remove Advertisements

  3. #2
    urbanski is offline Cadillac Owners 10000+ Posts
    Automobile(s): 05 CTS-V
    Join Date
    Mar 2003
    San 'tone, TX

    Re: How To Remove and Install Fuel Injectors

  4. Remove Advertisements
    Cadillac Forums

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Cadillac Posting Rules

  • You may not post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts