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Thread: E39 M54 2.5 Rough Idle

  1. #11
    BMWHaus Contributor
    Join Date
    Mar 2014
    Posts
    621

    RE: E39 M54 2.5 Rough Idle

    Hopefully the boot will be here wednesday/Thursday so I'll tackle that and the light switch, should be two very easy jobs.
    E39 525iA Sport - Sapphire Black - SOLD
    E39 528iT SE - Orient Blue - SOLD
    E39 540i/A Sport - Topaz Blue

  2. #12
    BMWHaus Contributor
    Join Date
    Mar 2014
    Posts
    621

    RE: E39 M54 2.5 Rough Idle

    Replaced the intake boot, appears to have made no difference even though the old was in shite! Will test it again in the morning when it's dead cold and see what it's like then.

    There's still a faint whistle on acceleration so I'm thinking there might be more air leaks about?
    E39 525iA Sport - Sapphire Black - SOLD
    E39 528iT SE - Orient Blue - SOLD
    E39 540i/A Sport - Topaz Blue

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