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Thread: Coil pack boot question (PIC)

  1. #1
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    Jan 1970
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    Exclamation Coil pack boot question (PIC)

    (First of all, THANKS, DANE! for helping me with removing coil packs via FB chat! it was a PITA)

    So I hope I didn't create a NEW problem while trying to troubleshoot another.

    So I got a P0302 code (misfire Cyl 2 ) with CEL and shaky idle, and I was going to to swap out coils 2 and 3 if the Code moves to #3 cylinder to make sure (if) it IS a coil pack.

    I had trouble getting coil pack 2 and 3 out so I tried coil 1 and it came out really easy BUT when I finally got the coil 2 out to swap with it, I noticed that the coil 1 looked different than coil 2 and looks like its (coil 1's) boot was missing? did it stay with the plug?

    SEE PIC (Coil pack 2 on left (normal) and 1 on right)

    what happened there?


    anyway, I pushed it back on to the same cylinder, and finally got 3 out. (looked normal, like 2 )
    So now, I swapped 2 and 3 and started car - same symptoms, shaky idle but RPMs steady - BUT NO CEL yet -
    so I guess It will take a few drive cycles for the CEL to come back on?

    (BTW I erased the previous code P0302)

    So, as of now, expecting CEL and expecting it to be P0203 which will show me it really is a bad coil on Cyl 2.

    But in the meantime I am worried about why that coil pack #1 looked weird as if something is missing from it. it's all hard plastic and looked like the rubber surround was missing. ???

    It was also a bit wet...
    Anyway, I pushed it back in, and it felt like it seated well. I hope it will continue to work as before..

    From a quick search I did, I don't think one can buy these boots separately if needed. (Bosch) . One CAN buy separate boots for Bremi coils (up to 2003), apparently. ECS tuning chat could not find a separate boot for Bosch.

    If I don't get any UNEXPECTED codes for cyl 1, due to the boot issue, should I just leave it alone? or would you change it due to the little wetness I saw? there was no oil to be seen in cyl 1 hole, but I am thinking something must have made it separate from the boot so easily...

    Oh, Can I drive the car around without the left part of the engine cover?

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    2005 AW ZHP Coupe. CW, Alcantara, Leather st. wheel, HK, Xenons, Step, Dinan chip & air box, USASpec, Sprint Booster


  2. #2
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    Yes. The boot stayed. Yes. You can drive without the cover.

    "No flamesuit required"
    "Flame suit NOT REQUIRED!!!"
    Call Me Dane l 2/2004 330i ZHP l 18x8 ET45 BBS CK's wrapped with Michelin Pilot Sport AS3+ @ 245-40-18 l KW V1 Coilovers in front l KW V1 springs w/ Bilstein B8 dampeners in rear l BMW Performance Rotors l UUC StrutBarbarian l Racing Dynamics Rear Strut Bar l Jim Conforti Shark Injector l Light Birch Interior Trim l Bimmian Celly Mount l M3 Trunk Mat l l e90 Performance E-Brake & Shift Knob l M3 Tri-Stitched Boots l AL Headlight Retrofit with ZKW Lenses l CobyWheel Wrap w/M3 Stitching l LCM sw 4.5 triple blink and rear fogs

  3. #3
    Join Date
    Jan 1970
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    Thanks again!

    Yep - Sure looks like it - one can see a black surround around the SP in that plug hole.

    Drove car around - no CEL yet. Seems almost normal while driving, but idles weak-ish. RPMs at idle steady.
    Car def. has a bit of power loss uphill. One can hear a change in the engine "tone" a few seconds after car starts.
    Probably will require more driving, overnight off, etc for the SES come back on. I have no clue what kind of drive cycle is needed on these cars for that.
    2005 AW ZHP Coupe. CW, Alcantara, Leather st. wheel, HK, Xenons, Step, Dinan chip & air box, USASpec, Sprint Booster


  4. #4
    Join Date
    Jan 1970
    Location
    Fayetteville, NC
    Posts
    1,752
    Can this thread be moved to mechanical section? I posted in maintenance by mistake. Thanks!
    2005 AW ZHP Coupe. CW, Alcantara, Leather st. wheel, HK, Xenons, Step, Dinan chip & air box, USASpec, Sprint Booster


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