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Thread: Have done repairs, car won't start ....

  1. #1
    Join Date
    Jul 2005
    Location
    South Africa
    Posts
    16

    Default Have done repairs, car won't start ....

    Hi All,

    I had a broken timing chain guide, opened her up (540 1994) - timing chain covers and lower sump cover. Now fixed .....

    Have put everything back together, set the camshafts with the timing blocks and locked in TDC, etc. Did everything I thought I was supposed to do, put all the bolts back in their places, no spares left afterwards .......

    and the sucker sounds like it wants to start but just won't.

    I have tested the following:
    1. Ignition coils;
    2. Crankshaft position sensor;
    3. Main relay;
    4. Engine coolant temp sensor;
    5. Intake air temp sensor;
    6. Throttle position sensor;
    7. Air flow sensor;
    8. Fuel Injectors; and
    9. Idle speed control valve.

    Don't have oxygen sensors.

    When I just keep winding the starter she seems to build up momentum like she's going to start but then there'll be a little blast and all the zing is gone, back to just being turned over with the starter.

    I'm pulling my hair out here. Any suggestions would be appreciated. I searched the forum but am bit lost for keywords other than "starting" "not starting", etc.

    Regards
    Richard

  2. #2
    Join Date
    Jan 2004
    Location
    Midlothian, Texas
    Posts
    133

    Default Can you hear your fuel pump?

    My wifes car wouldn't start yesterday. No codes, turned over fine, just wouldn't start. About a year ago my other E34 had a noisy fuel pump so I changed it out, but when I changed it I kept the old fuel pump since it was still working when I took it out. Sure enough...

    When the key is in pos. 2 you should be able to hear the fuel pump in the trunk or right rear wheel well. A normal pump will make a quiet but obvious "buzz".

    FWIW
    Mark Hall
    '95 525iA EAT chipped (just one now )
    '98 528iA

  3. #3
    Join Date
    Dec 2003
    Location
    Eastern Tennessee USi
    Posts
    14,839

    Default

    I cant hear my pump at all. I would do a compression test on it and see whats up there, you could have the cams off a tooth or 2 which would cause this.
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  4. #4
    Join Date
    Feb 2004
    Posts
    4,894

    Default

    Did you change the chain? I think you are off on timing.

  5. #5
    Join Date
    Jul 2005
    Location
    South Africa
    Posts
    16

    Default Timing is what I don't want to be thinking ...

    Yeah I'm thinking that I may have the cams off a tooth or two as Regal has suggested which would give me what Tiger is suggesting but I was reeeaaaallllyyy sure I had the cams set real tight with chains in position with the chain tensioner adjuster. etc.......
    Anyways, I checked for a fuel pump and there was none but I never recall any buzz before. So I held my foot flat on the gas while turning the engine overand I get the usual smell of too much fuel so I'm pretty sure the fuel pump is ok.

    Now I'm taking head covers off again and will test the timing again and report back....... For the life of me I don't know why I enjoy this ..... have been missing my V8 and now I just want it back...

  6. #6
    Join Date
    Jul 2005
    Location
    South Africa
    Posts
    16

    Default Compression Test ?

    Will the compression test show that my timing is out ? .... Valves opening and closing at the wrong times will give me low compression ?

  7. #7
    Join Date
    Jan 2004
    Posts
    4,150

    Default Sometimes yes.... If your far enough off then definitely yes but if thats the

    case it should be popping back out the intake manifold and in the exhaust..


    Quote Originally Posted by revert
    Will the compression test show that my timing is out ? .... Valves opening and closing at the wrong times will give me low compression ?


  8. #8
    Join Date
    Dec 2003
    Location
    Eastern Tennessee USi
    Posts
    14,839

    Default

    eeesh...that could also bent the valves. Hopefully its just a couple teeth off and thats it.

    Have you checked if your getting spark?

    Quote Originally Posted by Bill R.
    case it should be popping back out the intake manifold and in the exhaust..
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  9. #9
    Join Date
    Jul 2005
    Location
    South Africa
    Posts
    16

    Default

    yep, spark and fuel, no knocking of valves on piston tops

  10. #10
    Join Date
    Dec 2003
    Location
    Eastern Tennessee USi
    Posts
    14,839

    Default

    sounds like a nasty case of checking the cam timing.
    95 E34 530I V2.37
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

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