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420A Throttle Body

Posted by Mr Ortiz, Aug 13, 2019

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  1. Mr Ortiz

    Mr Ortiz Proven Member

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    Joined Jun 23, 2019
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    I need to know how to replace the fuel injectors on the 420A non-turbo
     

    Land Speed Build 144  3

    1998 Mitsubishi Eclipse N/T
    automatic · 2G DSM
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  2. silvreclips

    silvreclips Proven Member

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    Joined Jul 19, 2005
    Greenville, South Carolina
    It's very easy.

    1- Remove battery and intake, unplug injector harness.
    2- Remove fuel line on the driver side of the rail. 2 small bolts hold it on. Fuel will pour out of the rail so be ready with some towels.
    3- Remove the 2 bolts that hold the rail to the intake manifold. They are hard to get to but it can be done.
    4- The injectors can be pulled from the intake
     
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  3. Mr Ortiz

    Mr Ortiz Proven Member

    32
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    Hustontown, Pennsylvania
    Alright thanks. And will fuel continuously pour out?
     

    Land Speed Build 144  3

    1998 Mitsubishi Eclipse N/T
    automatic · 2G DSM
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  4. Dsm panda

    Dsm panda Proven Member

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    Joined Dec 8, 2017
    Franklin, Wisconsin
    Before you takeoff the rail off you need to depressurize the rail, unplug the fuel pump or pull fuse for it and crank it will start then die.
     

    964  2

    1991 Eagle Talon TSi
    327 whp · 307 lb/ft · 1G DSM

    Street Build 586  2

    1990 Plymouth Laser RS Turbo
    fwd · manual · 1G DSM
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  5. silvreclips

    silvreclips Proven Member

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    Greenville, South Carolina
    It will stop when the rail is empty. Good point depressurize the rail. The stock reg may hold pressure better then my afpr. There is also Schrader valve on the passenger side of the rail you can use to bleed the pressure down.
     
  6. BLACK'98DSM

    BLACK'98DSM Proven Member

    328
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    Joined Feb 9, 2019
    Hoover, Alabama
    Just a quick note... DO NOT use a hammer to put the new injectors in! You CAN push them in properly without banging on them. My brother broke the tops off his injectors by trying to wack them in place:ohdamn:
     

    Street Build 963  8

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    114  6

    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles

    192  1

    2012 Murray Explorer Dune
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  7. Mr Ortiz

    Mr Ortiz Proven Member

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    Joined Jun 23, 2019
    Hustontown, Pennsylvania
    Would the injectors screw in or just snug in?
     

    Land Speed Build 144  3

    1998 Mitsubishi Eclipse N/T
    automatic · 2G DSM
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  8. BLACK'98DSM

    BLACK'98DSM Proven Member

    328
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    Hoover, Alabama
    It's not a DSM, but this can be helpful.

     

    Street Build 963  8

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    114  6

    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles

    192  1

    2012 Murray Explorer Dune
    rwd · automatic · Misc Vehicles
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  9. BLACK'98DSM

    BLACK'98DSM Proven Member

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    Joined Feb 9, 2019
    Hoover, Alabama
    And no they don't screw in
     

    Street Build 963  8

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    114  6

    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles

    192  1

    2012 Murray Explorer Dune
    rwd · automatic · Misc Vehicles
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  10. Dsm panda

    Dsm panda Proven Member

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    Franklin, Wisconsin
    They use the pressure of the oring and rail (when installed) will hold them in place just press in on both sides should go in fairly easy no real muscle needed.
     

    964  2

    1991 Eagle Talon TSi
    327 whp · 307 lb/ft · 1G DSM

    Street Build 586  2

    1990 Plymouth Laser RS Turbo
    fwd · manual · 1G DSM
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  11. Mr Ortiz

    Mr Ortiz Proven Member

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    Hustontown, Pennsylvania
    Okay thanks man
     

    Land Speed Build 144  3

    1998 Mitsubishi Eclipse N/T
    automatic · 2G DSM
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  12. smbgsx

    smbgsx Proven Member

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    Savage, Minnesota
    It can help to lube the injector o rings with engine oil during the reinstall. Helps ease the installation.
     

    2K  25

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM
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  13. motomattx

    motomattx Proven Member

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    wampum, Pennsylvania
    Good old spit works well for lube also.
     

    Drag Race Build 2K  16

    1995 Mitsubishi Eclipse GST
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  14. Mr Ortiz

    Mr Ortiz Proven Member

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    Lol yeah
     

    Land Speed Build 144  3

    1998 Mitsubishi Eclipse N/T
    automatic · 2G DSM
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  15. Dsm panda

    Dsm panda Proven Member

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    Franklin, Wisconsin
    I use di electric grease as lube I forgot who on here said they use it (one of our more reputable and active members) but it works great and wont harm the oring and holds up decent to heat.
     

    964  2

    1991 Eagle Talon TSi
    327 whp · 307 lb/ft · 1G DSM

    Street Build 586  2

    1990 Plymouth Laser RS Turbo
    fwd · manual · 1G DSM
    Loading...
  16. Mr Ortiz

    Mr Ortiz Proven Member

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    Alright I’ll use that. And uh how would I properly depressurize the fuel rail or whatever it is that needs depressurized so I don’t lose a lot of fuel?
     

    Land Speed Build 144  3

    1998 Mitsubishi Eclipse N/T
    automatic · 2G DSM
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  17. Dsm panda

    Dsm panda Proven Member

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    Joined Dec 8, 2017
    Franklin, Wisconsin
    On my cars I pull the harness at the fuel pump then start it it will run then stumble and die(no pump = no more fuel) so it will use up the rails pressurised fuel and with no more pump no pressure will be built. Alternately you can pull a fuse
     

    964  2

    1991 Eagle Talon TSi
    327 whp · 307 lb/ft · 1G DSM

    Street Build 586  2

    1990 Plymouth Laser RS Turbo
    fwd · manual · 1G DSM
    Loading...
  18. Mr Ortiz

    Mr Ortiz Proven Member

    32
    5
    Joined Jun 23, 2019
    Hustontown, Pennsylvania
    Where would I pull off the fuel pump harness at?
     

    Land Speed Build 144  3

    1998 Mitsubishi Eclipse N/T
    automatic · 2G DSM
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  19. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    Independence, Kansas
    If the car has sat for more than a day, I say just grab an old rag and put it under the end of the fuel rail and take that end off. It is 2 10mm bolts and an oring seals it inside the rail. Remove 2 bolts and twist and pull out and the fitting will come out, the rag will catch any fuel in the rail and by this time, I would bet the pressure in the system has bled down but every now and then you will find a setup that holds pressure for days. This is how a TURBO car is set up, the 420a, I am not sure if it is exactly the same though.
     

    294  17

    1967 Chevrolet Camaro RS
    rwd · automatic · Misc Vehicles

    Street Build 409  4

    1998 Eagle Talon TSi
    fwd · manual · 2G DSM

    Street Build 3K  21

    1992 Eagle Talon TSi AWD
    awd · automatic · 1G DSM

    Street Build 5K  11  25

    1990 Eagle Talon TSi AWD
    13.620 @ 108.460 · 1G DSM

    4K  24

    1990 Eagle Talon TSi AWD
    13.612 @ 107.760 · 1G DSM
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  20. Mr Ortiz

    Mr Ortiz Proven Member

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    Joined Jun 23, 2019
    Hustontown, Pennsylvania
    Alright I’ll try it thanks should I get a set of injectors on eBay for about 50$? Or have autozone order in a set for about 100$?
     

    Land Speed Build 144  3

    1998 Mitsubishi Eclipse N/T
    automatic · 2G DSM
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  21. BLACK'98DSM

    BLACK'98DSM Proven Member

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    Joined Feb 9, 2019
    Hoover, Alabama
    Based on your DSM profile, you want a performance built engine. You will need something better than the stock injectors based on the wishlist provided.

    If youre just trying to stay stock for now then whatever will be fine, as long as its a name brand.
     

    Street Build 963  8

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    114  6

    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles

    192  1

    2012 Murray Explorer Dune
    rwd · automatic · Misc Vehicles
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  22. Mr Ortiz

    Mr Ortiz Proven Member

    32
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    Joined Jun 23, 2019
    Hustontown, Pennsylvania
    Yeah just looking for stock injectors for now, I’m putting in new plugs and wires tomorrow the car was really messing up one night
     

    Land Speed Build 144  3

    1998 Mitsubishi Eclipse N/T
    automatic · 2G DSM
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