Results 1 to 16 of 16

Thread: CEL

  1. #1
    Z8 Ate My Homework! Norcal's Avatar
    Join Date
    Nov 2002
    Posts
    2,471

    CEL

    My car has been running rough on startup for months (loud, bucks, chugs). Once the idle drops, it's fine. But it hasn't thrown any codes.... until today! I had an exhaust cam sensor done about 6 mo. ago, so I suspect it's one of those, given they tend to give out about the same time. I'll keep you posted.

  2. #2
    Z8Mania
    Guest
    Im sure you'll have it sorted out quickly. Good luck.

  3. #3
    DSC Off JohnAnthony's Avatar
    Join Date
    Jun 2011
    Posts
    98
    Quote Originally Posted by Norcal View Post
    My car has been running rough on startup for months (loud, bucks, chugs). Once the idle drops, it's fine. But it hasn't thrown any codes.... until today! I had an exhaust cam sensor done about 6 mo. ago, so I suspect it's one of those, given they tend to give out about the same time. I'll keep you posted.
    you should do them in 4s if they're the original ones

    it's surprising how much error these engines can have before a warning light/obd code is triggered
     

  4. #4
    Thanks for sending those shots over, next year I plan to do all four, the MAF's, and the hoses as part of my 10 year service.
    Andrew Macpherson

    Expert Z8 Inspections, with full support for both Z8 sale and purchases.

  5. #5
    Z8 Ate My Homework! Norcal's Avatar
    Join Date
    Nov 2002
    Posts
    2,471
    Iv'e been thinking about MAFs too. Anyone know how or why the new cam sensors look different?

  6. #6
    Z8 Guru 2112's Avatar
    Join Date
    Oct 2005
    Posts
    764
    Quote Originally Posted by Norcal View Post
    Anyone know how or why the new cam sensors look different?

    +1
    Different supplier it seems
    .
    2000 Red over black
    heavily modified for performance. Although, not to the level of GM's car

  7. #7
    DSC Off JohnAnthony's Avatar
    Join Date
    Jun 2011
    Posts
    98
    Quote Originally Posted by Norcal View Post
    Iv'e been thinking about MAFs too. Anyone know how or why the new cam sensors look different?

    as per the technical name it's a pulse generator so it generates magnetic pulses that are broken by the butterfly disks at the back of the camshafts



    i can only speculate on the difference
    -the older units where more prone to failure apparently so the new design might be built for longevity, but i have no way of telling if they are more precise or yet more sloppy

    -if anyone has a GT1 & a set of very low mileage original units you can try testing back to back for a few hundred hard miles to see what the differences are in vanos, fuel trim, power output etc


    reference images
    *2nd image is very large so you can get a good look at the back of the camshafts
       

  8. #8
    Z8Mania
    Guest
    Great info!!!!!!!!!!!! Thanks!!!!!!!!!!

  9. #9
    Z8 Guru 2112's Avatar
    Join Date
    Oct 2005
    Posts
    764
    Did someone mention an online source for the Cam Sensors?
    .
    2000 Red over black
    heavily modified for performance. Although, not to the level of GM's car

  10. #10
    DSC Off JohnAnthony's Avatar
    Join Date
    Jun 2011
    Posts
    98
    Quote Originally Posted by 2112 View Post
    Did someone mention an online source for the Cam Sensors?
    .
    i can't vouch for any of them, but i have used all 3

    these are BMW dealer websites with discounted prices, cross reference between the 3 for each part as prices vary between them

    Husker Auto Group
    Lincoln, NE
    bmwmercedesparts.com

    Tischer BMW
    Silverspring MD
    GetBMWParts.com

    Faulkner BMW
    Lancaster, PA
    BMWPartsSource.com

    *do not confuse BmwpartSSource.com with BmwpartSource.com as the Single S one never seems to get their website up

  11. #11
    Z8 Guru 2112's Avatar
    Join Date
    Oct 2005
    Posts
    764
    Thank you.

    Will Z8 Cam Sensor suffice or do we need exact part #s?
    .
    2000 Red over black
    heavily modified for performance. Although, not to the level of GM's car

  12. #12
    DSC Off JohnAnthony's Avatar
    Join Date
    Jun 2011
    Posts
    98
    Quote Originally Posted by 2112 View Post
    Thank you.

    Will Z8 Cam Sensor suffice or do we need exact part #s?
    .
    you'll need part numbers if you don't want to go crazy looking for the item via their catalogs

    advice on searching for parts
    - you can get the part number from REALOEM.COM since the website is easier to navigate than those dealer websites
    - then just drop in your VIN or any S62 Z8 vin when placing your order so in case a part no. has been superseded the dealer might alert you before placing the order or shipping

    http://realoem.com/bmw/showparts.do?...51&hg=11&fg=15

    http://realoem.com/bmw/partxref.do?part=12147539173

    *some items have pictures available so you can see in advance, it's mostly fasteners and screws, but really those are the ones you need to make sure of since there are many different size/lengths of the exact same looking item





    P.S.
    it would be great to see some Z8 owner's DIY since getting to the CPS in the Z8 might be a little trickier than on the M5

    here's a good chunk of the Z8 TIS for reference

    http://tis.spaghetticoder.org/e52/Z8_(S62)_ROADST/

  13. #13
    Z8 Guru 2112's Avatar
    Join Date
    Oct 2005
    Posts
    764
    Great advice. Thank you.

    Per your link;

    Intake Sensor # 12147539173

    Exhaust sensor # 13627796054
    .
    2000 Red over black
    heavily modified for performance. Although, not to the level of GM's car

  14. #14
    DSC Off JohnAnthony's Avatar
    Join Date
    Jun 2011
    Posts
    98
    Quote Originally Posted by 2112 View Post
    Great advice. Thank you.

    Per your link;

    Intake Sensor # 12147539173

    Exhaust sensor # 13627796054
    .
    yup same for M5

    $113-ish each

    ~$450 total
    +
    ~$30 shipping

    vs. what nonplussed was charged for changing a single one

    http://www.bmwz8.us/chat_frame.htm

  15. #15
    Z8 Guru 2112's Avatar
    Join Date
    Oct 2005
    Posts
    764
    Tried all three links, The Faulkner site would not load and I confirmed the spelling.

    As an example, the intake sensor MSRP os $141.80

    Husker sells for $131.50
    the RealOEM site lists for $116
    Tischer Sells for $113.48

    Thanks for the links!

    EDIT: Whoops You beat me to it!
    2000 Red over black
    heavily modified for performance. Although, not to the level of GM's car

  16. #16
    Administrator thegunguy's Avatar
    Join Date
    Sep 2005
    Posts
    2,703
    A lot of great info on these in the CPS sticky here.

    Bavauto.com is another great source.

    The sensor parts are the same on other BMW engines, which is why I believe they have improved the design. Lots of data showing they needed improvement.
    thegunguy