Materials to Maintain Your ZHP IIIII Hand Protection IIIII Tools to Maintain Your ZHP
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  1. #1

    Rough Idle and SES light

    So last week out of the blue, I'm coming home from dinner and at a stop in traffic I notice a pretty rough idle that hasn't gone away since. When I start the car up it doesn't start happening until the engine warms up and starts idling under 1000 RPM. When it's really bad it almost sounds like a popping or misfiring but this seems to be intermittent. Usually it's just a rough idling but when I give any amount of gas it goes away. The car drives fine and there seems to be no power loss. Yesterday driving home from work my Service Engine Soon light comes on and hasn't gone off since. I haven't ran anything yet to see if it throws any codes but I will have to do that this weekend. The car is a 2004 with 77K. Has any one have anything similar happen or have any experience with this?

    Thanks

  2. #2
    Join Date
    Mar 2014
    Location
    Houston, TX
    Posts
    1,745
    Check the lower intake boot

    My 7 year itch.

    Mods: BimmerBrakes Headers, Magnaflow full system, BYS Cross Drilled and Slotted Rotors, Hawk HPS Pads, Racing Dynamics Intake, Dinan Throttle Body, Bavarian Auto Short Shifter, ECS Tuning Strut Bar, Projector Fogs, Blackout Grilles, Euro Smoked Tail Lights, Black Corner Lights.

    Upcoming: Coil Overs, Sway Bars, Polyurethane Bushings all around, M3 motor mounts
    .

  3. #3
    Join Date
    Mar 2014
    Location
    Houston, TX
    Posts
    1,745
    If that's good, then I'd narrow it down to the disa or the vanos

    My 7 year itch.

    Mods: BimmerBrakes Headers, Magnaflow full system, BYS Cross Drilled and Slotted Rotors, Hawk HPS Pads, Racing Dynamics Intake, Dinan Throttle Body, Bavarian Auto Short Shifter, ECS Tuning Strut Bar, Projector Fogs, Blackout Grilles, Euro Smoked Tail Lights, Black Corner Lights.

    Upcoming: Coil Overs, Sway Bars, Polyurethane Bushings all around, M3 motor mounts
    .

  4. #4
    Join Date
    Dec 2012
    Location
    Salt Lake City, UT
    Posts
    6,871
    Update your DME as well. Maybe new O2 sensors.
    In the market for an E90 M3

  5. #5
    Join Date
    Jun 2011
    Location
    VA/DC
    Posts
    14,445
    Quote Originally Posted by Avetiso View Post
    Update your DME as well.
    Is that a DIY?


    Thumbs, iPhone, Tapatalk.

  6. #6
    Join Date
    Jun 2012
    Location
    Montreal, Canada
    Posts
    1,939
    Quote Originally Posted by ELCID86 View Post
    Is that a DIY?


    Thumbs, iPhone, Tapatalk.
    A bit more involved, but yes, I updated mine in my driveway.

    http://www.ebay.com/itm/271476322678

    Need a battery tender too, to ensure stable battery level.
    Alex'16 Melbourne Red 328d Touring
    M Sport + M Performance Package

    Gone, but not forgotten: '03 Imola Red 330i ZHP - 6MT


  7. #7
    Thanks guys. I'll look into all of those.

  8. #8
    Join Date
    Dec 2012
    Location
    Salt Lake City, UT
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    6,871
    Quote Originally Posted by ELCID86 View Post
    Is that a DIY?


    Thumbs, iPhone, Tapatalk.
    It was for me because I had SW set up for my by BP.
    In the market for an E90 M3

  9. #9
    Join Date
    Feb 2013
    Location
    Austin TX
    Posts
    7,597
    My e90 had rough idle and SES due to a bad coil. But, the symptoms were there all the time. Your situation seems slightly different. GL.

  10. #10
    Join Date
    Jun 2011
    Location
    VA/DC
    Posts
    14,445
    Quote Originally Posted by alexandre View Post
    A bit more involved, but yes, I updated mine in my driveway.

    http://www.ebay.com/itm/271476322678

    Need a battery tender too, to ensure stable battery level.
    Thanks. I have PASoft, but not this one.


    Thumbs, iPhone, Tapatalk.

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