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sudden engine miss

This is a discussion on sudden engine miss within the General Help forums, part of the LSx Technical Help Section category; i drove my baby about 100 or so miles with no problems. suddenly heard what sounded like an exhaust leak ...

  1. #1
    Junior Member ls1alltheway's Avatar
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    white&black
    1998z28w/t-tops

    sudden engine miss

    i drove my baby about 100 or so miles with no problems. suddenly heard what sounded like an exhaust leak then it went away, a few moments later the ses light came on and she started running rough. had her scanned and they told me that she had a missfire on #5. fixed that and no change. please,please someone help!!!

  2. #2
    Veteran 0rion's Avatar
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    06 duramax

    How did you fix it? Is it still showing number 5 as the cylinder? Have you checked the plug boot and all obvious things like that? There are several things it may be. From simple to not so simple.

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    Junior Member ls1alltheway's Avatar
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    havn't yet, and i checked all the norm. plug wire ect. i even changed plugs and wires, but no help there. i also check the harness connection and it seemed to be fine. my only other option is to swap coils and see if the miss moves to another cylinder.

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    Veteran 0rion's Avatar
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    Also try using a long screwdriver as a stethescopic and listen to that injector and make sure it's firing. Is it making any sounds at all over there now like a broke valve spring or anything like that?

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    Junior Member ls1alltheway's Avatar
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    no strange noises other than the exhaust like sound. other than that it's been pretty smooth.

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