Replacing Fuel Injectors
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This is a discussion on Replacing Fuel Injectors within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I am looking for a little help on replacing my fuel injectors. I have a 2003 WRX with about 130,000 ...

  1. #1
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    Replacing Fuel Injectors

    I am looking for a little help on replacing my fuel injectors. I have a 2003 WRX with about 130,000 miles on it. I keep getting check engine lights for lean fuel on rail 3 and 4. So I am assuming I need to replace my fuel injectors and I want to use the same size injectors that it came with. I am going to do it myself ... I have done everthing on it since day 1 so i feel pretty confident in doing it. I just have a few questions. What size are the stock injectors? Do I need to have the fuel system remapped if I am using the same stock size injectors? And any tips or advice would be greatly appreciated on the project. Thanks.
    Chris

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  3. #2
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    What makes you think that it's the injectors?

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    Replacing Fuel Injectors

    Because I have been getting lean fuel on rail on #3 and #1. The performance has gone down and its just not driving the same.

  5. #4
    He simply abides. SD_GR's Avatar
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    Is the car otherwise stock?

    There are plenty of used parts available so you should be able to find used injectors for your specific model. You may not need them though.

    Did you happen to replace the plugs recently? They were due at 120k. Have you double checked all the connections? Do you ever smell fuel? The stock injectors are good quality units and should last a very long time, especially with the (good!) fuels available in the developed world.

    If, and only if, you exclude everything (everything!) else, you could consider swapping the injectors side to side. If you do not see the CELs follow the injectors then it's not the injectors. This isn't my idea of fun though and I'd not do it unless there were no other options -- and for you there almost certainly are other options.
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  6. #5
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    Quote Originally Posted by Lineriderz View Post
    Because I have been getting lean fuel on rail on #3 and #1. The performance has gone down and its just not driving the same.
    Again, what makes you think replacing the injectors is what will fix your car? Of all of the possibilities, this is likely the last thing that will.

  7. #6
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    List the exact DTC codes you are getting.
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