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Prepping for Fuel Injector Service

Discussion in '1st Gen. Tacomas (1995-2004)' started by jammer, Feb 20, 2020.

  1. Feb 20, 2020 at 9:28 AM
    #1
    jammer

    jammer [OP] 2003 Toyota PreRunner 3.4L

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    Ben
    Bentonville, AR
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    2003 Lunar Mist Tacoma PreRunner 3.4l
    OME Coils/Bilstein 5100's front / 5125's rear 105 Amp Denso Alternator
    Hey guys. In the near future, I plan on sending my injectors to motorwestperformance or witchhunter to be flow tested / cleaned.
    This is for a 2003 3.4L
    I know I need the thee items under "Replacement parts I know I need" but I'm not 100% sure if the other parts listed are replaced or do I need to order?
    Am I missing anything??

    https://motorwestperformance.com/about-us/
    https://www.witchhunter.com/

    *Retails are from Toyotapartsdeal.com
    Replacement Parts I know I need:
    1. Gasket, Throttle Body 22271-62050 $5.01
    2. Intake Manifold Gasket x 2 17176-62040 $10.15
    3. Fuel rail gaskets x 6 90430-12026 $1.36

    Are these replaced when sent to be cleaned or do I need to order:
    1. Insulator, Injector Vibration x 6 23291-20010 $6.25
    2. Ring, O (Fuel Injector) x 12 90301-07024 $2.61
    3. Ring, O (Fuel Pressure Regulator) x 1 90301-07024 $2.61
    Below photo from www.witchhunter.com
    upload_2020-2-20_11-24-48.jpg


    upload_2020-2-20_10-28-39.jpg
     
    GQ7227 likes this.
  2. Feb 20, 2020 at 9:30 AM
    #2
    GQ7227

    GQ7227 mw survivor

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    309km east of Hazard ...the good life
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    '97 black SR5 0g ~ MT @ 176k ...
    black woolWax, green IFC, borlaCB, custom Line-X PC drums, skid, nuts, hooks, 1/4 silver frame...
    have you ever had the BG cleaning service done to your system?
     
    2004Taco likes this.
  3. Feb 20, 2020 at 9:33 AM
    #3
    jammer

    jammer [OP] 2003 Toyota PreRunner 3.4L

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    OME Coils/Bilstein 5100's front / 5125's rear 105 Amp Denso Alternator
    Hey Jay....No, I have not. I've run BG44K through the tank before.
     
    GQ7227 likes this.
  4. Feb 20, 2020 at 9:34 AM
    #4
    GQ7227

    GQ7227 mw survivor

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    309km east of Hazard ...the good life
    Vehicle:
    '97 black SR5 0g ~ MT @ 176k ...
    black woolWax, green IFC, borlaCB, custom Line-X PC drums, skid, nuts, hooks, 1/4 silver frame...
    yes, i have done that too before a long time ago!

    a little orange bottle
     
    jammer [OP] likes this.
  5. Feb 20, 2020 at 9:38 AM
    #5
    jammer

    jammer [OP] 2003 Toyota PreRunner 3.4L

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    OME Coils/Bilstein 5100's front / 5125's rear 105 Amp Denso Alternator
    Yeah, same for me. It may have been one of those "makes me feel good" at the moment items, but I swear she ran stronger when that was in the tank.
     
    GQ7227 likes this.
  6. Feb 20, 2020 at 9:41 AM
    #6
    GQ7227

    GQ7227 mw survivor

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    309km east of Hazard ...the good life
    Vehicle:
    '97 black SR5 0g ~ MT @ 176k ...
    black woolWax, green IFC, borlaCB, custom Line-X PC drums, skid, nuts, hooks, 1/4 silver frame...
    have you heard of or tried this stuff?

    [​IMG]
     
  7. Feb 20, 2020 at 2:04 PM
    #7
    jammer

    jammer [OP] 2003 Toyota PreRunner 3.4L

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    2003 Lunar Mist Tacoma PreRunner 3.4l
    OME Coils/Bilstein 5100's front / 5125's rear 105 Amp Denso Alternator
    No, I wasn't aware BG put out an ethanol fuel treatment.
    I do use Star Tron Enzyme Treatment in my motorcycle. Mainly because it sits for long periods of time without running.
    It's sold at our local Honda and BMW motorcycle dealerships.

    upload_2020-2-20_16-3-46.jpg
     

    Attached Files:

    GQ7227 likes this.
  8. Feb 20, 2020 at 10:41 PM
    #8
    Danjor2

    Danjor2 Well-Known Member

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    I just recently sent my injectors off to https://www.rcfuelinjection.com/ highly recommended them they were awesome. I'm not affiliated with them just a customer. They replaced all the parts on the injectors I didn't need to order anything except replacing intake gaskets which I just reused old ones. Made a crazy difference. Turns out my best injector was only at half flow with 3 dripping....
     
  9. Feb 21, 2020 at 5:28 AM
    #9
    GQ7227

    GQ7227 mw survivor

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    309km east of Hazard ...the good life
    Vehicle:
    '97 black SR5 0g ~ MT @ 176k ...
    black woolWax, green IFC, borlaCB, custom Line-X PC drums, skid, nuts, hooks, 1/4 silver frame...
    what was your mileage when that needed done
     
    jammer [OP] likes this.
  10. Feb 21, 2020 at 5:38 AM
    #10
    jammer

    jammer [OP] 2003 Toyota PreRunner 3.4L

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    2003 Lunar Mist Tacoma PreRunner 3.4l
    OME Coils/Bilstein 5100's front / 5125's rear 105 Amp Denso Alternator
    Good to know. Thank you for the response!
     
  11. Feb 21, 2020 at 9:01 AM
    #11
    skeezix

    skeezix Well-Known Member

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    Yes, replace the O-ring that's labeled "23280E" and is located at the rear of the driver's side fuel rail.

    And you don't need the parts in the second half of your list (ask the rebuilder just to be sure though).

    Have fun tightening up banjo bolt 23802C at the rear of the passenger side fuel rail! When I did this job it was a real PITA disconnecting the wiring harness cover and moving it far enough to the rear to put a torque wrench on the bolt, and torquing it, without cracking or breaking the cover.

    Be sure to look at this video before starting the job.

    Good luck, the job is not as bad as one might think, but it requires a fair bit of patience. ;)
     
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  12. Feb 21, 2020 at 9:48 AM
    #12
    taco03Trd

    taco03Trd 03 rig trd v6

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    03 DC prerunner trd v6 2wd
    Ome 881 5100's jba's looking for more
    Hey guys at what milage is recommended to do this service sending in injectors or would a fuel treatment bottle help out ?
     
    GQ7227 likes this.
  13. Feb 21, 2020 at 12:31 PM
    #13
    thenodnarb

    thenodnarb Well-Known Member

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    I'm wondering if my injectors aren't the primary cause of my poor mileage...
     
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  14. Feb 21, 2020 at 12:34 PM
    #14
    NYCTaco52

    NYCTaco52 Half man, half goat

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  15. Feb 21, 2020 at 1:00 PM
    #15
    GQ7227

    GQ7227 mw survivor

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    309km east of Hazard ...the good life
    Vehicle:
    '97 black SR5 0g ~ MT @ 176k ...
    black woolWax, green IFC, borlaCB, custom Line-X PC drums, skid, nuts, hooks, 1/4 silver frame...
    need more than a bottle i think
    that has to go through filter and gets diluted?
     
    taco03Trd likes this.
  16. Feb 21, 2020 at 1:12 PM
    #16
    taco03Trd

    taco03Trd 03 rig trd v6

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    Ome 881 5100's jba's looking for more
    Whats a good gas treatment ?
     
  17. Feb 21, 2020 at 1:19 PM
    #17
    GQ7227

    GQ7227 mw survivor

    Joined:
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    Messages:
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    Gender:
    Male
    First Name:
    J A Y
    309km east of Hazard ...the good life
    Vehicle:
    '97 black SR5 0g ~ MT @ 176k ...
    black woolWax, green IFC, borlaCB, custom Line-X PC drums, skid, nuts, hooks, 1/4 silver frame...
    BG has good products but pricey
     
  18. Feb 21, 2020 at 2:06 PM
    #18
    Danjor2

    Danjor2 Well-Known Member

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    Mine had 198k supercharged last 50k and had just swapped engine from bent connecting rod and figured it was a good time to do it. Might explain the bent connecting rod with my injectors being so clogged. I religiously changed fuel filter, bought name brand gas, used fuel system treatments yet they still went bad.
     
    GQ7227 and jammer [OP] like this.
  19. Feb 21, 2020 at 2:12 PM
    #19
    jammer

    jammer [OP] 2003 Toyota PreRunner 3.4L

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    2003 Lunar Mist Tacoma PreRunner 3.4l
    OME Coils/Bilstein 5100's front / 5125's rear 105 Amp Denso Alternator
    One reason I'm doing this.
    Main reason is just the age of the injectors and the amount of "stuff" that could be interfering with the flow.
    I'm trying to put some zep back in it's step!
     
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  20. Feb 21, 2020 at 2:13 PM
    #20
    Danjor2

    Danjor2 Well-Known Member

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    They also sent me a before and after flow analysis and a bag with all my old parts they replaced.
     

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