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Thread: Turbo fix - Engine Misfire!!

  1. #1
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    Default Turbo fix - Engine Misfire!!

    Hi all,

    It's about time I started on the car again. Car has been delivered back to my home after being in the garage for over 3 weeks. This is the work carried out so far:-

    1) The engine has been on for over 3-4 days continuously to remove most of the oil contaminated in the exhaust system. There is now minimal smoke from exhaust.

    2) No error codes present.

    3) Compression test – Cylinder 3 found to be low on compression. There is still a misfire when the car is ticking over.

    The garage has suggested that a new engine is required as cylinder 3 is low on compression. When the car is driven @ 2500 RPM it drives like there are no problems, smooth, no misfire, etc.

    I need some guidance if the engine really needs to be replaced, or can I just replace the damaged valve, piston, or whatever is damaged?

    I think this may be the cheaper option, as the engine has only done 85k, and prior before the turbo blowing, there was no issues at all.

    Oh when the turbo was changed I did not flush out the intercooler or pipes.

    Are there any other checks I can do to rule out what is exactly the problem?

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    Default

    Sorry first ever post car is Vectra 2.2 DTI

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    Regular Member TonyP2020's Avatar
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    Default

    Welcome to Vectra-c forum.

    This might sound a bit low tech and easy, but when the engine was run for 3-4 days to clear the oil, did you/them add any additives to the fuel?

    My "maybe worth a try" advice is to do an engine flush with Forte engine flush, replace the oil and filter and then put a whole bottle of Forte diesel treatment into half a tank of diesel and take it for a long drive on a fast motorway.

    It MIGHT, just MIGHT, clean a dirty valve seat if thats what is causing the low compression.

    No, I'm not on commission, but as far as I know it's what the trade use.

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    Default

    Hello,

    Thanks for the reply but i will try this, but i do not think it will work as i have been told its an engine change. I do not know if this is true.

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    Regular Member MrDerv's Avatar
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    Default

    Forte Diesel treatment won't clean a dirty valve seat, just the fuel lines and injectors. Something like 10k Boost Aerosol would sort something like that as it's introduced into the air intake. Dirty valve seat does sound like a good one, especially how coked up the intake can get, there may be a bit dislodged and made it's way down there

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    Regular Member TonyP2020's Avatar
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    Default

    Agreed it a long shot, but worth trying if you are driving the car around anyway.
    Hopefully someone local to you can lend a hand.

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    Default

    I cannot drive the car as the mis fire is pretty bad. What do you suggest if that stuff done work?

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    Default

    Don't know, but worth doing first and we can assess any change of symptoms if it doesn't work

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    I have made a mistake by not cleaning the intercooler and pipes. After the turbo replacement, i carried out an oil and filer change as good engineering practice. When i started the car there was a slight misfire, after a short while engine was running smooth.

    Then suddenly came this horrible misfire which is still with the car today.

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    Regular Member TonyP2020's Avatar
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    Hey mate, dont dispare, the car is not dead yet.

    The 10K decoke spray is a very good idea, considering the amount the cr4p the EGR lets back into the inlet manifold and this will help to clear it.

    The thread below is for a 1.9CDti, but similar for the 2.0Dti, just spray it into the turbo directly or the short length of rubber pipe before the turbo, but NOT the MAF plastic tube. It will clean the system more than just running it on air.

    http://www.vectra-c.com/forum/showthread.php?t=98947

    Partially (mostly) blocking the EGR will really help.
    My EGR blocking thread. It does work, had it on mine for a year, No errors or spanner light, and it's cheap.

    http://www.vectra-c.com/forum/showthread.php?t=143056

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