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Thread: Bmw e31 m70 engine doesn't start help and advice - SOLVED, fusible links

  1. #1
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    Bmw e31 m70 engine doesn't start help and advice - SOLVED, fusible links

    I'm looking for help and advice i recently changed voltage regulator in alternator and the car doesn't start now i checked fuses they are good ignition turns but doesn't want to start i even pull the spark plug out to see if there is a spark but no there isnt'd can you help me with your expertise what's can be wrong

  2. #2
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    Check coils and dmes to see if they are good.

  3. #3
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    How i can check that ?

  4. #4
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    I had a blown coil and didn't spot the problem until I looked at the bottom of it. It had blown off - literally - like boom. Take a visual look at the coils and see if they have any "odd" shapes to them bulges and what not. I would suggest the old lets see of the spark jumps routine but that can be very very dangerous. But if all you did is change the voltage regulator I would start there.

  5. #5
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    Vento
    Hope this help , check this document with info about check your crank sensor either if you din't disconnect those. They send signal to DME for spark .
    Attached Files Attached Files

  6. #6
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    Check the fusible links in the trunk, right side by battery.
    91 850 (Panzer), 2012 Mini Cooper Countryman (WifeMobile) www.wuffer.ca


  7. #7
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    I checked the fusible link is there more than one in the trunk ?IMG_0341.jpgthis one looks ok

  8. #8
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    Quote Originally Posted by Vento288 View Post
    I checked the fusible link is there more than one in the trunk ?IMG_0341.jpgthis one looks ok
    Well the car cranks but doesn't start, I think the problem will be somewhere else. Did you check coils and DMEs(can you connect to them with diagnostics?)? No spark on both banks?

  9. #9
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    No sparks on both banks i dont have diagnostic to connect visually coils are ok , but visually they are ok how can i check the DME s only with diagnostic tool ? Maybe there is a problem with voltage regulator or alternator it self ?

  10. #10
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    On the alternator there is a B + and D + and there is 3 wires blue red and black whats the proper connection to the posts black and red together and blue by it self or the blue and red together tight to the B+ post together IMG_0342.jpgi don't remember how the wires were connected to the B+ and D+ terminals any one can help thanks in advance
    Last edited by Vento288; 05-02-2017 at 10:35 PM.

  11. #11
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    Quote Originally Posted by Vento288 View Post
    I checked the fusible link is there more than one in the trunk ?IMG_0341.jpgthis one looks ok
    There are 2 of them, both must be o.k. Follow the red wire from both batteries and you will find it. Also this one remove and check, cracks could be under the bolts.
    One of my wrenching buddies had this problem years ago, sometimes engine started, sometimes not. He also believed there is only one fusible link, but then we checked together and found the 2nd one, replaced it and then the no start problem was solved.
    Shogun tricks and tips for the E32 series are HERE!

  12. #12
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    Any one can help me ? In this forum whats the proper wire needs to bo connected to the alternator ?

  13. #13
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    I will check tonight on the fuses

  14. #14
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    I checked fusible links and they are ok no broken parts car still doesnt want to start what reason can be ?

  15. #15
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    I think i have enough of playing with that car im going to parting out this vehicle any body want some parts out of it let me know

  16. #16
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    How did you test the fusible links? Use a multimeter. Or just had a look at them?
    Just today on another forum the no start problem was solved, first he also said I checked the fusible link and it is o.k., last reply was:

    Fixed it thanks for the help, it was the sheath covered fuseable link, the reason I didn't think it was blown was cause it has a white silicone over the part that melted on the fuse and needed the multimeter to find it since I thought removing that coating would break the fuse for sure. Thanks again and good day Sir.
    Shogun tricks and tips for the E32 series are HERE!

  17. #17
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    I found it was under the shrink tube shield i cut the shield and voila suprise broken fuse , now how i can fix this one ?IMG_0347.jpgits a 80 amp fuse

  18. #18
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    Guys miracle happened i cut out the fusible link went to the car audio store and bought a fuse holder with 80 amp fuse put everything together , prayed of course as well went to the car turned ignition on and boom car started like brand new , again with your help guys i wouldn't know what to do Thank you all for your effort to help me huge appreciating . No more parts for sale here i attached pictures how i did with your help IMG_0348.jpgIMG_0349.jpgIMG_0350.jpgcost 13 canadian funds and my quality time

  19. #19
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    Quote Originally Posted by Vento288 View Post
    Guys miracle happened i cut out the fusible link went to the car audio store and bought a fuse holder with 80 amp fuse put everything together , prayed of course as well went to the car turned ignition on and boom car started like brand new , again with your help guys i wouldn't know what to do Thank you all for your effort to help me huge appreciating . No more parts for sale here i attached pictures how i did with your help IMG_0348.jpgIMG_0349.jpgIMG_0350.jpgcost 13 canadian funds and my quality time
    Excellent work!

  20. #20
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    Good job but...pretty sure that fusible link is only a 50 amp item. The other one in the black case attached to the inner fender is an 80 amp.
    Will be in Edmonton tomorrow on way to Westlock...
    91 850 (Panzer), 2012 Mini Cooper Countryman (WifeMobile) www.wuffer.ca


  21. #21
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    Would you mind stopping by on your way to Westlock?

  22. #22
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    Sorry - on a mission heading back to BC hopefully bright and early Monday morning.We will be at the Ramada in Westlock mid afternoon Sunday. Feel free to text 778 823 two 8 fifty or meet us there.Travelling with MaxLumens.
    91 850 (Panzer), 2012 Mini Cooper Countryman (WifeMobile) www.wuffer.ca


  23. #23
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    IMG_0510.jpgI bought 2 new batteries and checked the voltage looks good but when i started the car it shows
    IMG_0511.jpgIs it ok or the alternator needs to be replaced i did changed the voltage regulator not to while ago
    please advice thank you

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