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Thread: m30 cold start issue

  1. #1
    Join Date
    Feb 2018
    Location
    finland
    Posts
    27
    My Cars
    bmw e30 (m30b34)

    m30 cold start issue

    hello so I have a e30 with m30b34 so I guess it's best to post it in this section, well I have a little problem it's about -20 celcius in finland at the moment and its a bitch to get my m30 started, it will start after cranking it for ages and usually the battery runs out of charge before it will start. once it does start up it runs completely fine no problem whatsoever it will idle at high rpm for a while and eventuall drop to around 600. so any ideas where I should start checking? could it be that the cold start valve is working improperly? however the Cold start valve is put in a place that is almost impossible to get to without taking whole intake manifold off
    Last edited by Jalmarsson666; 02-24-2018 at 10:00 AM.

  2. #2
    Join Date
    Jun 2007
    Location
    Great White North
    Posts
    11,299
    My Cars
    various
    Could be the cold start injector or that sensor that controls it. Here's a link to help with diagnosing
    https://blog.bavauto.com/5078/bmw-e28-m30-535i-no-start-difficult-start-issues-l-jetronic-motronic/

    The Bentley manual also has good info
    Last edited by zubbie; 02-24-2018 at 11:44 AM.

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