C5V6 Exclusive 2002 misfire problem
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  1. #1
    Tadpole
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    Default C5V6 Exclusive 2002 misfire problem

    I know this is a familiar topic and much has been written about however I have a particular problem that maybe someone can help with?

    I have just had the cam belt replaced by Tom Dolan. Whilst doing this he repaired the gaskets to the camshaft box tops which were leaking oil. When I picked the car up it drove fine for the first 15mins then started running roughly and finally started misfiring badly with the service light and engine management light coming on. The Lexia came back with misfire errors on cylinders 1, 2 and 3.

    Suspecting faulty coils I had all of them replaced and also the spark plugs. I picked up the car today and exactly the same problem occurred in the same way. Again misfires on 1,2 and 3. So given that there are new coils and plugs it must be something else?

    The fact that the problem occurs after a 10-15min period after starting seems to relate to the engine reaching a certain temperature? I have read posts about leaks in the inlet mainfold and also about cabling problems to banks of cylinders (which would explain the 1,2,3 failure pattern).

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    Any advice that anyone could offer would be much appreciated.

  2. #2
    1000+ Posts cav91's Avatar
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    I'm not sure if he would have removed the injectors but is it possible the there not sealing efficiently anymore?
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  3. #3
    Real cars have hydraulics DoubleChevron's Avatar
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    I'd be worried the cam timing has shifted myself .......
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  4. #4
    1000+ Posts cav91's Avatar
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    But Why would it be fine for 15 minutes? Oh unless one of the actuators for the variable Cam timing has failed.
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  5. #5
    Real cars have hydraulics DoubleChevron's Avatar
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    Quote Originally Posted by cav91 View Post
    But Why would it be fine for 15 minutes? Oh unless one of the actuators for the variable Cam timing has failed.
    No reason other than the fact if something starts playing up not soon after work has been done .... I'm betting 99.99995% of the time the problem is going to be with something that was just touched ( or bumper in the area that was worked on).
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  6. #6
    1000+ Posts cav91's Avatar
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    Or not it could be not plugged in that would explain Why just after being worked on!
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