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Thread: Spark Plugs Lean or Normal?

  1. #1
    Join Date
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    Spark Plugs Lean or Normal?

    Look like they are lean? Thanks

    Sent from my Mi MIX 2S using Tapatalk

  2. #2
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    11/88 E32 750iL+98 E36M3
    moved to E36 forum
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  3. #3
    Join Date
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    2001 525it
    In the old days of racing you would read plugs a given rpm then shut the engine off,,I would have a shop read live data if your concerned, but seeing how the engine management system does every thing it's probably alright

  4. #4
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    1999 M3 , 1999 328is
    Looks pretty good to me. I'd have doubts that you would ever be overly lean as the ECU should take care of it all. Granted that assumes you have good O2 sensors and no vacuum leaks.

    I've seen a similar color to plugs from lead fowling when I put too much lead additive in my Austin Healey. But a nice light brown color like that isn't bad. If it were actually lean I would expect a lot more buildup.

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