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Thread: My EML and check engine just came on

  1. #1
    Join Date
    Dec 2014
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    Los Angeles, California
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    144

    My EML and check engine just came on

    Sounds and feels like misfire...as soon as I committed to bite the bullet and get my AC fixed this happens to me

    I think I read cleaning the maf and throttle bodies can fix this any ideas what’s going on?

  2. #2
    Join Date
    Jul 2020
    Location
    Georgia
    Posts
    48
    My Cars
    91 850i
    If the check engine light is on, there should be stored error codes. Do the stomp test and see what codes the car gives you.

  3. #3
    Join Date
    Dec 2014
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    Quote Originally Posted by Laserface View Post
    If the check engine light is on, there should be stored error codes. Do the stomp test and see what codes the car gives you.
    1222 oxygen sensor?

    just started the car and the codes are gone and it runs normal now but there’s a new finding...the right side exhaust is a now smoking and smells

  4. #4
    Join Date
    Oct 2016
    Location
    Shoreview MN
    Posts
    979
    My Cars
    Had a 1991 BMW 850

    A Fix

    Pull all 4 relays in the EML Box and test them with a multimeter. One of mine was flaky and caused this $20 for a new one

  5. #5
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    Dec 2014
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    Quote Originally Posted by rjjablo View Post
    Pull all 4 relays in the EML Box and test them with a multimeter. One of mine was flaky and caused this $20 for a new one
    I’ll keep that in mind thanks. I’m gonna try cleaning the maf and throttle bodies first because a couple weeks ago my EML came on and the trans fail light came on and the car went into limp mode so I think that might be a fix...I let the car sit and those codes went away and the car drove fine for like 2 weeks before this

  6. #6
    Join Date
    Oct 2016
    Location
    Shoreview MN
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    979
    My Cars
    Had a 1991 BMW 850

    15 Reasons

    Quote Originally Posted by estoque View Post
    I’ll keep that in mind thanks. I’m gonna try cleaning the maf and throttle bodies first because a couple weeks ago my EML came on and the trans fail light came on and the car went into limp mode so I think that might be a fix...I let the car sit and those codes went away and the car drove fine for like 2 weeks before this
    You are into one of the 15 Reasons it will go into Trans Fail Mode. None of which are typically the O2 Sensors The EML/fuel pump Relay would do it when I hit a bump

  7. #7
    Join Date
    Jun 2008
    Location
    SF Bay Area
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    3,795
    My Cars
    Supercharged 850ci
    99% it's your throttles.
    PM me, I can re manufacture them for you.

    Second culprit is your EML computer, but very little chances of that.

  8. #8
    Join Date
    Dec 2014
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    Quote Originally Posted by rjjablo View Post
    You are into one of the 15 Reasons it will go into Trans Fail Mode. None of which are typically the O2 Sensors The EML/fuel pump Relay would do it when I hit a bump
    Quote Originally Posted by dragon850 View Post
    99% it's your throttles.
    PM me, I can re manufacture them for you.

    Second culprit is your EML computer, but very little chances of that.
    cleaned out a bunch of grime out of the throttle bodies and sprayed down the mafs too codes are gone and it sounds like it’s back to normal...I think it’s time to change out the spark plugs too

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