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L76 messy idle

Discussion in 'VZ Holden Commodore (2004 - 2006)' started by rat64eh, Aug 30, 2012.

  1. Aug 30, 2012 #1
    rat64eh

    rat64eh New Member

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    Hi all,
    L76 6L, just replaced, plugs with iridium ngk's, new ICE HT leads, cleaned the throttle plate
    replaced the 4 O2 sensors, cleaned the air box replaced the air filter and cleaned the MAF.
    she still idles a little rough, not smooth like and efi should i assume.
    what should be looked at next?

    also did the L76 come from the factory with the orange OAT type coolant?

    cheers phil
     
    rat64eh, Aug 30, 2012
    #1
  2. Aug 30, 2012 #2
    Munz

    Munz Right Foot Action

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    coolant should be red, GM preferably. Could possibly be the coolant temp sensor - passenger side head above the front spark plug


    [​IMG]
     
    Munz, Aug 30, 2012
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  3. Aug 30, 2012 #3
    petern64

    petern64 Member

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    My L76 is doing the same thing , I changed plugs,leads, air filter and it still does have a bit of rough idle but it runs fine!
    my coolant is orange/red as well

    Pete
     
    petern64, Aug 30, 2012
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  4. Aug 30, 2012 #4
    WazzaVN

    WazzaVN Wazza VN

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    My L76 idles a little rough too lol. Seems to be fine otherwise though.
     
    WazzaVN, Aug 30, 2012
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  5. Aug 30, 2012 #5
    rat64eh

    rat64eh New Member

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    thanks guys,
    will do the coolant asap, looks like the temp sensor is new. might just need a good thrashing!

    cheers phil
     
    rat64eh, Aug 30, 2012
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  6. Aug 30, 2012 #6
    WazzaVN

    WazzaVN Wazza VN

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    Get her cammed mate. Then you've got an excuse for a nice lumpy idle haha.
     
    WazzaVN, Aug 30, 2012
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  7. Aug 31, 2012 #7
    rat64eh

    rat64eh New Member

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    thats the plan, now how to tell the wife shes getting a 12sec shopping trolley!

    cheers phil
     
    rat64eh, Aug 31, 2012
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  8. Aug 31, 2012 #8
    MYVESSV8

    MYVESSV8 Well-Known Member

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    Check your harmonic balancer, it may be worn (too much run-out, or wobble)
     
    MYVESSV8, Aug 31, 2012
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  9. Sep 1, 2012 #9
    rat64eh

    rat64eh New Member

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    is that where the crank angle sensor is?

    cheers phil
     
    rat64eh, Sep 1, 2012
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  10. Sep 1, 2012 #10
    MYVESSV8

    MYVESSV8 Well-Known Member

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    not sure where crank angle sensor is on the VZ but your harmonic balancer does just that, smooths out the engine (and other things) (thats why they are two parts steel sorrounded by rubber) and as a drive
     
    MYVESSV8, Sep 1, 2012
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