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Thread: 95 530i Engine will crank, but not start

  1. #1
    Join Date
    Jan 2006
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    Connecticut
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    Default 95 530i Engine will crank, but not start

    I stepped into my car this morning and it would not start. The check engine light had been on for awhile but I have been putting off diagnosing it. I performed the stomp test, and code 1231 was returned. (Oxygen 2 sensor lean/rich control stop) I believe it is not related.



    I then consulted Bentley to orient myself with the standard electrical tests.

    I started by checking the fuel pump. The pump is receiving about 10 volts at the connector in the truck.

    However I do not hear it running. How loud is it supposed to be? My ear is about 6 inches away from the pump when someone cranks the car.

    Eric

  2. #2
    Join Date
    Dec 2003
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    Eastern Tennessee USi
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    dont think the pump runs constantly once at pressure, pull the line at the drivers side fuel rail and turn the key and see if your getting fuel, would be nice to have help with that test of fuel can go everywhere. I can NOT hear my pump at all EVER.

    After this reboot the computer and see if it stars if you have pressure, if not we can troubleshoot farther.
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  3. #3
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    Default 95 530i Engine will crank, but not start

    Quote Originally Posted by 632 Regal
    dont think the pump runs constantly once at pressure, pull the line at the drivers side fuel rail and turn the key and see if your getting fuel, would be nice to have help with that test of fuel can go everywhere. I can NOT hear my pump at all EVER.

    After this reboot the computer and see if it stars if you have pressure, if not we can troubleshoot farther.
    Will do. I will check it first thing tomorrow. Thanks for the help.

  4. #4
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    Location
    Connecticut
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    Default

    Quote Originally Posted by eelley
    Will do. I will check it first thing tomorrow. Thanks for the help.
    Sorry for the long delay in responding Regal. It took me a while to find a spot to work on my car. I just moved to a new area, live in apartment and can not work on the car in the parking lot of the complex (written in my lease).

    Okay..

    Later that evening I removed the ECM. Someone posted that if the car fails to start, disconnect the ECU and reconnect after thirty minutes. The next morning I reinstalled it, the car started and has been running ever since.

    ECM brain cramp?

    ??? Ummmmm?!!!

    What do ya think?

  5. #5
    Join Date
    Dec 2003
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    Eastern Tennessee USi
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    weird stuff....did you do the reboot?
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  6. #6
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    Default

    Quote Originally Posted by 632 Regal
    weird stuff....did you do the reboot?
    If rebooting is unplugging the computer and replugging it the next morning, yes.

    I agree, a bit strange.

  7. #7
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    I do the shogun reboot
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  8. #8
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    Location
    Connecticut
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    Default

    Quote Originally Posted by 632 Regal
    I do the shogun reboot
    Whats that?

  9. #9
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    Default

    Quote Originally Posted by eelley
    Whats that?
    Found the thread! Thanks

  10. #10
    Join Date
    Feb 2004
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    4,892

    Default

    Probably crank position sensor.

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