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Thread: M44 Rough Idle/Exhaust Vibration

  1. 05-17-2008, 07:16 PM #1
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    Hagbard
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    M44 Rough Idle/Exhaust Vibration

    I recently replaced my sparkplugs wth NGK Coppers and the only CEL code I'm getting is the "Catalyst Efficiency" code. I replaced my engine mounts and I also cleaned-out the Idle Control Valve to see if that would steady the rough idle but it didn't. What could it be? Some of my hoses are aging, but I haven't noticed any cracks in them. My exhaust has shaken-baby syndrome and is now making a rattling sound due to the constant vibration. What could be causing all that vibration?
    Last edited by Hagbard; 05-17-2008 at 08:46 PM.
    1982 320i E21 Coupe, Manual, Cashmere Metallic, 162K+ miles (Daily Driver)
    1997 318i E36 Sedan, Manual, Black, 388K+ miles (RIP)
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  2. 05-17-2008, 08:46 PM #2
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    Hagbard
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    bump
    1982 320i E21 Coupe, Manual, Cashmere Metallic, 162K+ miles (Daily Driver)
    1997 318i E36 Sedan, Manual, Black, 388K+ miles (RIP)
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  3. 05-18-2008, 04:21 AM #3
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    Umm, might want to ask this question in the appropriate section.


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  4. 05-18-2008, 09:03 AM #4
    united323is
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    you need cats. they are probably clogged.
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  5. 05-18-2008, 02:30 PM #5
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    Quote Originally Posted by CMG View Post
    Umm, might want to ask this question in the appropriate section.
    +1....or try 318ti.org...those guys really know the M44 better than anyone...
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  6. 05-19-2008, 10:03 AM #6
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    Quote Originally Posted by united323is View Post
    you need cats. they are probably clogged.
    What are "cats?" Me not know.
    1982 320i E21 Coupe, Manual, Cashmere Metallic, 162K+ miles (Daily Driver)
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  7. 05-19-2008, 10:07 AM #7
    95M3freak
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    Quote Originally Posted by Hagbard View Post
    What are "cats?" Me not know.
    catalytic converters...the big boxy things that are in the middle of your exhaust.

    and you might want to start posting in a section where people have the same car as you.
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