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Thread: 740iL Fuel injector relay location

  1. #1
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    Question 740iL Fuel injector relay location

    Is there a fuel injector relay for the 740IL?. If so, where is the the location?
    Thanks.

  2. #2
    plik's Avatar
    plik is offline Voted "Nicest Guy" - 2007
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  3. #3
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    Thank you for the reply.
    I would like to know where is the location of this relay.

    Thanks again.

  4. #4
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    try www.realoem.com for schematics/diagrams

  5. #5
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    I could be wrong but probably in the trunk, above the battery and behind or beside the fuses.

    ----------------------------------------------------------

  6. #6
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    Maybe you clarify first which model, E32 or E38.
    In 1994 both models were produced.
    The E32 740 does not have any relays in the trunk, only under the hood and under driver side rear seat.
    Shogun tricks and tips for the E32 series are HERE!

  7. #7
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    It's the 1994 740IL. The reason why I asked if there is really a fuel injector relay, it's because I removed all the injectors and sent it out for cleaning and would like to replace the relay as well. The relays under the rear seat behind the driver's side are not marked. Can you tell me which one?

    Thank you and I appreciate your help.

  8. #8
    plik's Avatar
    plik is offline Voted "Nicest Guy" - 2007
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    Quote Originally Posted by bimmer740il94 View Post
    It's the 1994 740IL. The reason why I asked if there is really a fuel injector relay, it's because I removed all the injectors and sent it out for cleaning and would like to replace the relay as well. The relays under the rear seat behind the driver's side are not marked. Can you tell me which one?

    Thank you and I appreciate your help.
    He's asking if you have an E32 or E38.

  9. #9
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    In case it is a E32, here you will find all details about fuse and relay location of a 1993 and early 1994 E32, check it out
    http://shark.armchair.mb.ca/~dave/BMW/e32/e32_93.pdf
    And if you do not know if that is E32 or E38, go to my website below, scroll down till you find the VIN decoder.
    VIN decoder: http://www.bmw-z1.com/VIN/VINdecode-e.cgi

    There you find the exact production month and year and more details.
    Pls add that to your profile in the avatar, Model AND month/year of production.
    Even the month of a year is important to look into the details of wiring diagrams, there have been so many changes over the years.
    Shogun tricks and tips for the E32 series are HERE!

  10. #10
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    Here's the update to my post.
    The car is E32.
    Thank you Shogun for the electrical wiring diagrams.
    To begin with, I still have probelems with my Bimmer.
    Still the car wont run.
    Here are the work I've done so far.
    1. Sent all the fuel injectors to RC Engineering for calibration.
    2. Replaced Fuel pump relay.
    3. Installed new fuel filter (2)
    4. Replaced fuel injector relay
    5. Check all fuses and they are all good.
    Repalced spark plugs (platinumtip (four tips)
    6. Cleaned intake manifold.
    7. Reseal intake manifold.
    8. Replaced Spark plug wire connectors.
    9. Replaced fuel regulator.
    10. Replaced air filter.
    11. Replaced camshaft position sensor.
    12. Oxygen sensors replaced recently.
    13. Idle control valve replaced recently.
    14. Wter temp sensor, coolant temp sensor replaced recently.

    After I reinstalled all the parts, I turned the engine and it runs. That was yesterday. The engine runs smoothly and no fault reading.
    I did not drive the car because I may get stuck again, but I re started the car several times and it was fine. The voltage regulator is charging at 14 volts.
    This afternoon, I tried to start the car but it wont go. It just keep on cranking but don't want to run.
    I check the battery and Im reading 12 volts.
    During start (engine cranking) the battery vlotage is at 10 volts. I even have my battery jumper connected to add on the juice. Still the car won't run.
    There are no engine faults on the check engine when the car was started yesterday.
    I have no idea what is causing the car not to run.
    Could anyone help me diagnose the problem? Maybe you guys experienced this kind of trouble before. Please share your findings.
    I will greatly appreciate all your help.Thank you.

  11. #11
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    i have a 1995 e38 and im looking for the fuel relay as well is there a fuel shut of in this car thanks
    kay b

  12. #12
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    hey there i to have a 1995 740il and i think i am having the same problem.
    i can not locate the fuel injector relay. Any help?????

  13. #13
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    I think its the third to the right above the battery in the trunk

  14. #14
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    accurateglass

    Quote Originally Posted by vinnys95e38 View Post
    I think its the third to the right above the battery in the trunk
    well i have the same problem still has and my car runs great here is the trick in the fuse box under the hood the fuse should say fuel pump use a piece of wire to jump that fuse and watch the car starts and run you may have to hold it for a few seconds till the pump starts after it begins to run you can remove the wire it will run all day and restart perfect but keep the wire handy i notived mine does that when the temperture gets alittle low i live in nc let me know

    - - - Updated - - -

    just to make sure is he can check that fuse for voltage while he trys to start the car when it wont start there is no power

  15. #15
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    Huh? You realize this thread is 6 years old and is for the E38?

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