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Thread: help: vibrating

  1. #1
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    Default help: vibrating

    I started my 1998 E39 540i today in the morning and the engine began vibrating and the rpms were going down around 400rpm...while driving i felt a loss of power and it kinda bogged and shook at take off... any help with this issue would be great. i baught this car recently and there has been no tune-up that i know of done.
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  2. #2
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    So you bought a used 540i without inspecting it first......isn't this magical.....

  3. #3
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    Default

    Do some maintenance.

    Oil change/filter
    fuel/air filter
    plugs
    check tire pressure

  4. #4
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    Originally posted by qmf
    So you bought a used 540i without inspecting it first......isn't this magical.....
    did i say i never inspected it? btw this problem just occured yesterday

    oil/filter were changed like 400 kms ago
    plugs/wires will be changed tommrow thnx sr240sx
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  5. #5
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    i scanned it at AutoValue and turns out it was a misfire in cyl #2
    i changed the sparkplugs and no change, the car is still vibrating and the next step is the coil packs..there are no sparkplug wires so ill see what goes on
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  6. #6
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    fill up gas lately?, maybe some bad gas?, we had a car at work with misfire, the lady said she filled up at some small town up north, turned out to be shitty gas

  7. #7
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    yeah i guessed that too so will see i just droped 25 liters of 91 octane in it from empty and 2 bottles of injector cleaner so ill see if that helps but thankyou
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  8. #8
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    check the coil boots before you replace the coilpacks. On my e36 I had similar issues, boots were cracked in 3/6....gl
    Psalm 144(1): Blessed be the Lord my strength which teacheth my hands to war, and my fingers to fight.

  9. #9
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    one of them was cracked i dont think it was cyl #2....would that cause a misfire also?
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  10. #10
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    Originally posted by ALI BABA
    one of them was cracked i dont think it was cyl #2....would that cause a misfire also?
    If the boots are cracked then yes it will cause a misfire but since it's in cylinder #2....

    When you see a misfire happening it could only be one of two things or a bigger problem. Usually it's the sparkplugs or cracked boots. Goodluck!

  11. #11
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    Originally posted by Bimmer88


    If the boots are cracked then yes it will cause a misfire but since it's in cylinder #2....

    When you see a misfire happening it could only be one of two things or a bigger problem. Usually it's the sparkplugs or cracked boots. Goodluck!
    I will be changing the boot in 1 hour and the spark plugs were changed...im hoping its nothing more than that
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  12. #12
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    problem solved it was the ignition coils
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  13. #13
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    Originally posted by SR240SX

    check tire pressure


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