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Thread: E46 won't start when warm

  1. #1
    Join Date
    Jun 2019
    Location
    Ireland
    Posts
    1
    My Cars
    E46

    E46 won't start when warm

    Recently left my 03 e46 in to garage cause the fuel pump was starting every time which turned out to be an intermittent wire but since it's come back it starts when cold but when it heats up won't there's just a click it's not the starter any help guys wud be greatly appreciated thanks in advance

  2. #2
    Join Date
    Jul 2011
    Location
    Arlington, VA
    Posts
    9,933
    My Cars
    2018 BMW M240i
    Let me see if I have this correct: when the engine is cold the engine will start properly, but when the engine is hot all you get is a click. I think your starter is bad. However, do you have a digital multimeter? You need to check the voltage at the the starter when you get a click. Check it at the main power “stud” where the large red wire/cable connects to the starter. This should have battery voltage at all times. See if the voltage drops at all. As you’re in Ireland I’m assuming the car gas a 4 cylinder engine, so access to the starter should be fairly easy. Also, do you have a second key? Try it the next time the no start happens.

  3. #3
    Join Date
    Mar 2011
    Location
    PNW
    Posts
    935
    My Cars
    LS E46
    There may be a problem with the signal wire going to the starter solenoid from the DME box. I’ve had this problem on 2 e46’s and think it’s started happening on a 3rd. If you can feed 12v directly to the solenoid and the car starts, there’s your problem.

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