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Thread: no start after 540 rocker cover change.

  1. #51
    Join Date
    Oct 2004
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    Reinholds, PA
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    85 344i, 89 535i
    The extra connector by the filter housing might be for your charcoal canister purge valve. It's a 2 pin connector. No problem leaving that unplugged as long as your charcoal canister was removed properly. It will throw a code though.

    Definitely check continuity of the yellow/black wire from the x20 connector to the starter. Also check continuity across the x20 plug when it's together. They *usually* don't have issues, but I did have that exact thing happen back when I had an m50 in my e30, which used an identical x20 connector. The x20 is the main (basically, the only) interface from the engine wiring to the chassis wiring.


    As for the ground wires melting, I had a similar thing happen to me when I fired up my m60 e30 after doing some work. Forgot the main chassis/block ground strap. When I turned the key, I got one click, then smoke from the passenger side engine harness plastic box. The engine tried to ground itself via the oil level sensor, which melted the wires going to it since they couldn't handle the load.

    As another person mentioned, you should really check that it didn't burn any other wires nearby.
    85 325e m60b44 6 speed / 89 535i/5
    e30 restoration and V8 swap
    The finished product!

  2. #52
    Join Date
    Jan 2011
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    UK
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    Sky Dives
    The connector I don't think is for the purge, that one has ametal spring clip on it, I know this cause it came off once and sucked my fuel tank in on itself destroying my fuel sender. The connector is a black 2 pin one iirc, like the one for the sidelights?

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    i have continuity between the ews relay and the engine side of the x20 connector.

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    i have continuity between the ews relay and the engine side of the x20 connector.

    - - - Updated - - -

    i have no continuity between the x55 and starter....

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    with any luck im gonna feel INCREDIBLY stupid real soon....

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    Quote Originally Posted by yamoda View Post
    This might sound stupid but this exact thing happened to me when I did the gaskets as well, turned out I forgot to plug the connector to the starter under the oil filter back in...
    you sir, are the winner!

    how stupid do i feel right now :$

    many thanks to all who've helped and sorry for wasting your time when it was something so stupid! on the plus side, ive learnt the colours in german and know a bit more about how all that electrical witchcraft works!
    Last edited by ninjastyle; 04-24-2014 at 04:49 PM.

  3. #53
    Join Date
    Jun 2007
    Location
    Butte, Montana
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    25,563
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    Suck
    Quote Originally Posted by ninjastyle View Post
    The connector I don't think is for the purge, that one has ametal spring clip on it, I know this cause it came off once and sucked my fuel tank in on itself destroying my fuel sender. The connector is a black 2 pin one iirc, like the one for the sidelights?

    - - - Updated - - -

    i have continuity between the ews relay and the engine side of the x20 connector.

    - - - Updated - - -

    i have continuity between the ews relay and the engine side of the x20 connector.

    - - - Updated - - -

    i have no continuity between the x55 and starter....

    - - - Updated - - -

    with any luck im gonna feel INCREDIBLY stupid real soon....

    - - - Updated - - -



    you sir, are the winner!

    how stupid do i feel right now :$


    Still doesnt explain your harness meltation but glad you got it going.

    Go ahead and bite. Plenty for everyone.

  4. #54
    Join Date
    Jan 2011
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    UK
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    Sky Dives
    true and im oh so glad i discovered that little darling. on the plus side ill have a spare DME and can swap the loom over with one i have on its way.
    i got a mate who had a crash in his 540 and the earth broke and he got the same thing with the melted earths.

  5. #55
    Join Date
    Jan 2009
    Location
    Wisconsin
    Posts
    525
    My Cars
    '95 525it
    Quote Originally Posted by ninjastyle View Post
    on the plus side, ive learnt the colours in german and know a bit more about how all that electrical witchcraft works!
    Hey, it was just an unplugged connector but you used your trusty multimeter to track it down. Glad you're back on the road.

  6. #56
    Join Date
    Dec 2004
    Location
    CT, USA
    Posts
    4,161
    My Cars
    e28, e34, e39
    Hopefully the OP isn't considering driving it with those melted wires. I think cars have burnt to the ground with lesser wiring issues. I'd be a bit scared to say the least.
    demet

  7. #57
    Join Date
    Jan 2011
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    UK
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    ive been driving it for god knows how long with them as they were, they got some leccy tape on em for now, i got a new loom on its way to me.

  8. #58
    Join Date
    Sep 2006
    Location
    UK
    Posts
    194
    My Cars
    e34 540 e30 335
    Quote Originally Posted by ninjastyle View Post
    you sir, are the winner!

    how stupid do i feel right now :$

    many thanks to all who've helped and sorry for wasting your time when it was something so stupid! on the plus side, ive learnt the colours in german and know a bit more about how all that electrical witchcraft works!
    I know what you mean by feeling stupid, took me a while to figure it out!
    BTW whereabouts in the UK are you?
    Last edited by yamoda; 04-25-2014 at 04:48 AM.
    E30 1992 335 Cabriolet - Transplant nearly finished
    E31 1992 850ci - Hartge H8 6.0 conversion
    E34 1995 540A - Stock, low mileage, hi spec and soon to FI'd
    E36 1994 M3 - GM LS3 Transplant
    E38 2001 735 - Daily driver
    E46 2002 330 Cab - Stock
    M62B46 with TTV flywheel, dual plate clutch and 6 speed box sitting in a corner waiting for me to decide where to put it.

  9. #59
    Join Date
    Jan 2011
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    UK
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    Sky Dives
    I'm in the southwest, nearish bristol got any pics of your e31 don't see many of them over here!

  10. #60
    Join Date
    Sep 2006
    Location
    UK
    Posts
    194
    My Cars
    e34 540 e30 335
    Not got many pic's as I'm still working on getting it up to spec but here's a couple
    IMAG0133.jpg850 back.jpg
    And a couple of my M3
    IMAG0102.jpgIMAG0101_zps44ae419e.jpg
    Attached Images Attached Images
    E30 1992 335 Cabriolet - Transplant nearly finished
    E31 1992 850ci - Hartge H8 6.0 conversion
    E34 1995 540A - Stock, low mileage, hi spec and soon to FI'd
    E36 1994 M3 - GM LS3 Transplant
    E38 2001 735 - Daily driver
    E46 2002 330 Cab - Stock
    M62B46 with TTV flywheel, dual plate clutch and 6 speed box sitting in a corner waiting for me to decide where to put it.

  11. #61
    Join Date
    Sep 2006
    Location
    UK
    Posts
    194
    My Cars
    e34 540 e30 335
    And a couple of teaser shots of the E34
    IMAG0251.jpgIMAG0273.jpg
    E30 1992 335 Cabriolet - Transplant nearly finished
    E31 1992 850ci - Hartge H8 6.0 conversion
    E34 1995 540A - Stock, low mileage, hi spec and soon to FI'd
    E36 1994 M3 - GM LS3 Transplant
    E38 2001 735 - Daily driver
    E46 2002 330 Cab - Stock
    M62B46 with TTV flywheel, dual plate clutch and 6 speed box sitting in a corner waiting for me to decide where to put it.

  12. #62
    Join Date
    Jan 2011
    Location
    UK
    Posts
    526
    My Cars
    Sky Dives
    Awesome man! Where bouts in the UK are you? If you ever come to sell the e31 can I have first refusal?

  13. #63
    Join Date
    Sep 2006
    Location
    UK
    Posts
    194
    My Cars
    e34 540 e30 335
    I'm in the London Hertfordshire border, can't imagine selling the E31 but if I do, I'll let you know on here.
    E30 1992 335 Cabriolet - Transplant nearly finished
    E31 1992 850ci - Hartge H8 6.0 conversion
    E34 1995 540A - Stock, low mileage, hi spec and soon to FI'd
    E36 1994 M3 - GM LS3 Transplant
    E38 2001 735 - Daily driver
    E46 2002 330 Cab - Stock
    M62B46 with TTV flywheel, dual plate clutch and 6 speed box sitting in a corner waiting for me to decide where to put it.

  14. #64
    Join Date
    Jan 2011
    Location
    UK
    Posts
    526
    My Cars
    Sky Dives
    cheers. whats the story with the e34? you got a build thread anywhere?

  15. #65
    Join Date
    Sep 2006
    Location
    UK
    Posts
    194
    My Cars
    e34 540 e30 335
    Quote Originally Posted by ninjastyle View Post
    cheers. whats the story with the e34? you got a build thread anywhere?
    Not yet, it's a bit left field with fitting the chargecooler behind the bumper iron so its still experimental. If it works out, I'll start a thread.
    E30 1992 335 Cabriolet - Transplant nearly finished
    E31 1992 850ci - Hartge H8 6.0 conversion
    E34 1995 540A - Stock, low mileage, hi spec and soon to FI'd
    E36 1994 M3 - GM LS3 Transplant
    E38 2001 735 - Daily driver
    E46 2002 330 Cab - Stock
    M62B46 with TTV flywheel, dual plate clutch and 6 speed box sitting in a corner waiting for me to decide where to put it.

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