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  1. #1
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    Member No: 76912 minetree is an unknown quantity at this point minetree's Avatar
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    Two big weekend issues...

    Mystery 1)
    Start car - drive to store - turn off car - go buy candy bar - get back in car - turn key - starter just cranks and cranks and cranks... First nothing - then more cranking - then more nothing... Then more cranking - and slowly, ever so slowly (as long as you leave the starter engaged while this is going on) the car begins to sputter and cough it's way back to life... (Brand new fuel pumps (pressure and transfer)... Leave the car for more than a few minutes after you shut it off (30 minutes to an hour) turn the key - starts right away...

    That would be mystery number 1.

    Issue number 2 is:
    Can anyone just give me a few things I can unplug or cut the power to that might be causing a battery rundown.(3-5 days and battery is weak - this is also brand new) I've already done the lights (trunk, hood, glove) I don't need any special features other than heat or the radio and wipers. I just want the car to run...

    Thanks..
    Minetree
    88 535i
    210,000+ Still Kickin
    Remaned Head, all stock.
    88 Mazda 323 4Banger
    168,000+ Still Kickin
    Terminal Velocity 113mph
    32miles to the gallon
    <img src="http://www.michaelminetree.com/DSCN0004.JPG"

  2. #2
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    Re: Reading with all fuses

    from positive post to positive cable is 230 mA. After I pull #5 it goes to 110 - that's all I know so far..Minetree
    88 535i
    210,000+ Still Kickin
    Remaned Head, all stock.
    88 Mazda 323 4Banger
    168,000+ Still Kickin
    Terminal Velocity 113mph
    32miles to the gallon
    <img src="http://www.michaelminetree.com/DSCN0004.JPG"

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    Member No: 58142 ROYinGA is an unknown quantity at this point ROYinGA's Avatar
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    First, open trunk and see if trunk light is warm.

    Mine was staying on all the time. Next put your ammeter between battery terminal and car and start pulling fuses. You should be less that 50 ma. My 750 is only about 30ma forgot what my e28 is. Will check.

  4. #4
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    All the bulbs are out.

    With all fuses out there was still a reading of 114 mA.
    I took out the main relay and it dropped to under 10 mA.

    Once again - with ALL the fuses out it was still reading 114.
    Minetree
    88 535i
    210,000+ Still Kickin
    Remaned Head, all stock.
    88 Mazda 323 4Banger
    168,000+ Still Kickin
    Terminal Velocity 113mph
    32miles to the gallon
    <img src="http://www.michaelminetree.com/DSCN0004.JPG"

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    I can't imagine unless it's something in the

    ignition switch. The 10 ma may be the radio memory. Have you researched the wiring diagram? See ETMs on e38.org/e28.

  6. #6
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    the strangest thing is the main relay

    being pulled causes it to go from 114 to 4 mA - Should the realy be drawing that much - or is there something else in the circuit which the relay then connects?

    I have the Bentley diagrams - but seeing as how I failed English and Math from the 3rd grade on - I have trouble reading them and understanding what they're trying to tell me.

    I was a bad, bad student... But I can rebuild an M30...
    Minetree
    88 535i
    210,000+ Still Kickin
    Remaned Head, all stock.
    88 Mazda 323 4Banger
    168,000+ Still Kickin
    Terminal Velocity 113mph
    32miles to the gallon
    <img src="http://www.michaelminetree.com/DSCN0004.JPG"

  7. #7
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    Member No: 35219 scantu is an unknown quantity at this point scantu's Avatar
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    Re: Two big weekend issues...

    My 88 535is had the same starting issue. it could be the ECU. Try turning the ignition with your left hand and open the glove box with your right hand. Tap the ECU box and the car should fire right up. This is a very common issue. there are 3 solder joints on a resistor pack that are natorious for cracking. i heated mine back up and have not had an issue for 3 years.

    Check out this link.. good luck

    http://e28-535i.com/technical/e28-ECU_Repair.php


    Sergio
    88 535is
    Austin, TX

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