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Thread: No spark/no compression after engine replacement

  1. #1
    Join Date
    Jan 2013
    Location
    Raleigh, NC
    Posts
    15
    My Cars
    2007 BMW 530xi

    No spark/no compression after engine replacement

    So my situation is that I have no spark or compression after replacing my engine. I was able to gain compression after removing the valvetronic motor and trying to crank the engine but it was only around 90 psi. I believe there is something electrical which is not right. Do you have any suggestions for me. I am using the wiring harness that came with the engine that I purchased. I also cleared all the codes and codes that popped up again are 2a9a and 2a9b. Would those codes cause a no spark or no compression issue?

  2. #2
    Join Date
    Jan 2013
    Location
    Raleigh, NC
    Posts
    15
    My Cars
    2007 BMW 530xi
    So I replaced the cps and the eccentric SHAFT sensor. Changed out vanos solenoids and cam position sensors. Still nothing. I am taking it the a bummer specialist shop and they are going to reprogram it. I think the dme is locked up from the whole issue the the engine and bad battery.

  3. #3
    Join Date
    Nov 2012
    Location
    CLE, OH
    Posts
    10
    My Cars
    750i, X5
    Did you ever resolve your issue?

  4. #4
    Join Date
    Mar 2008
    Location
    Napa, Ca
    Posts
    1,796
    My Cars
    1987 M6
    No compression is scary. These are interference engines. Hope it really is just cam timing, and not so offset that it bent valvess.

    Are ALL cylinders at 90?

    Jose
    1987 M6
    Livin the dream!

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