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Thread: Cylinder Balance Test

  1. #1
    Lifetime Member driver456's Avatar
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    Default Cylinder Balance Test

    What does it mean when you have a weak cylinder in the cylinder balance test,And how do you correct it?.....................Paul

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    It means that cylinder is not running as strongly as the others.
    How to correct it?
    That usually requires some mechanical knowledge and equipment.
    Causes could be
    spark plug
    ht lead
    coil
    injector
    riding valve
    burnt valve
    holed piston
    bad inj driver
    Bad contact or broken wire to coil or injector
    broken valve spring
    seized valve

    Starting to get the idea?
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  3. #3
    Joe (Moderator) joecar's Avatar
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    Can you post a screen picture of the test results...

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    EFILive Reseller ringram's Avatar
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    .. piston rings, damaged bore, blown head gasket etc..
    If its shocking you can fix it with a 402 stroker engine replacement
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  5. #5
    Lifetime Member driver456's Avatar
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    Quote Originally Posted by joecar
    Can you post a screen picture of the test results...
    Its on my lap top and thats not connected to the internet.Oh man I hope its just a bad plug.I went to the Corvette Challenge in NJ on Saturday and went a 12.44,The car feels and sounds great and I'm about half done tuning it,Idles a little ruff though.UPDATE,I changed the #4 cyl.plug and its a little stronger now.
    Last edited by driver456; April 17th, 2006 at 10:50 AM.

  6. #6
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    FWIW - I did back to back cylinder tests and got very different results. 1 st test showed 2 weak cylinders and the second showed the previously weak cylinders stronger than the stongest cylinder from the 1 st test. It was much more consistant after the second test. Also nothing changed between tests and were done within about 2 min. of each other. I chalked it up to a fluke.
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  7. #7
    Lifetime Member driver456's Avatar
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    Quote Originally Posted by DWS6
    FWIW - I did back to back cylinder tests and got very different results. 1 st test showed 2 weak cylinders and the second showed the previously weak cylinders stronger than the stongest cylinder from the 1 st test. It was much more consistant after the second test. Also nothing changed between tests and were done within about 2 min. of each other. I chalked it up to a fluke.
    Yea,cause now its showing #8 cyl. week,Oh well.As long as its not a valve or piston damage I'm glad

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