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Thread: Turbo m50b25nv VEMS plug and play. Crank no start. Brand new build.

  1. #1
    Join Date
    Oct 2018
    Location
    Eugene
    Posts
    42
    My Cars
    Working on it

    Turbo m50b25nv VEMS plug and play. Crank no start. Brand new build.

    I bought the plug and play, sized my injectors (VEMS formula equated to 3.1), and she cranks really strong and healthy. Will not turn over. I am not getting any tach signal from my primary trigger (crankshaft position sensor), which I think is causing my startup issue. I tested the CkPS and it was dead accurate at 540 ohms.

    If I set the secondary trigger to primary I get a tach reading, while cranking, of 140-180 rpm (I assume this means my camshaft position sensor is functioning properly). I have done some research and have read that running a secondary trigger is more advanced and is not necessary for initial startup (or at all in some cases).

    If anyone has experience with VEMS and m50's specifically, please respond here or send me a PM. I don't want to waste time writing all of my findings here if no one can help.

    Engine is 8.5:1 compression
    80 lb Deka injectors

    Thanks in advance,
    Reed

  2. #2
    Join Date
    Oct 2016
    Location
    Turkey
    Posts
    12
    My Cars
    E21 M54 Turbo
    please post Trigger scope log..

  3. #3
    Join Date
    Jun 2016
    Location
    The Netherlands
    Posts
    25
    My Cars
    1991 325i e36 Sedan
    I'm also very interested in your results.

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