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Thread: E46 318 engine stuttering - fuel pump issue?

  1. #1
    Join Date
    Aug 2018
    Location
    Oxford, UK
    Posts
    1
    My Cars
    2003 E46 318Ci

    E46 318 engine stuttering - fuel pump issue?

    Hi all,

    My 2003 318 has suddenly (began when I left work the other day and got worse as I drove home) started stuttering as if the engine is not getting enough fuel. It is struggling to accelerate, whereas cruising at high RPM and constant speed is ok (ie when you don't hit the gas)

    The engine starts just fine, maybe with a bit of a delay compared to before.

    Idling in neutral the revs don't drop but the engine is making a kind of rhythmic stutter... like a chugachugachugachuga sound (think like a steam train I guess).

    Oh, and the EML light is permanently on now, though sometimes starts flashing if I drive it a bit.

    I can still drive around, but it takes a ton more gas to move anywhere and is uncomfortable... and really slow to accelerate.

    Does anyone have any pointers? I plan on getting it looked at soon but would like to know if it's likely to be an easy DIY job (would be my first) or if it's likely to be a very expensive fix...

    Thank you!

    Edit: I should add the strangely enough, that same day I refuelled in the morning and topped up the engine oil (I did spill a bit of oil too..?)
    Last edited by mfw318; 08-23-2018 at 02:01 PM. Reason: more details

  2. #2
    Join Date
    Apr 2015
    Location
    Netherlands
    Posts
    164
    My Cars
    2000 E46 328i
    Scan for error codes..

  3. #3
    Join Date
    Dec 2013
    Location
    Chicagoland area
    Posts
    4,372
    My Cars
    EXOTICS
    Test for fuel pressure at fuel rail, at various speeds/rpm's.

  4. #4
    Join Date
    Mar 2017
    Location
    Norwich, Connecticut.
    Posts
    486
    My Cars
    E46 wag. E36 convertible
    Do not rule out transmission.

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