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Thread: Emissions

  1. #1
    Regular Member simon1's Avatar
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    Default Emissions

    Mates car failed mot on emissions
    Having spent £750 on discs and springs
    Brake pipe and hose to get work done
    Garage said service to pass mot so did
    And it failed them again been told engine
    Burning oil by garage it's a 1.8
    Can any one make sense of this
    Fast idle test - failed, 2nd fast idle test - speed ok, co not ok 7.5% vol, hc not ok - 1001 ppm, lambda not ok - 0.77.
    Natural idle test - speed ok, co not okay - 11.17% volume. Hope that makes sense!

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    Regular Member lutonmatt's Avatar
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    Default

    7% now thats high for one it will need a new cat as thats cooked

    what car is it

    a 1.8 vauxhall lump will always burn oil always have done

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    Default

    My Veccy failed MOT on emmissions, low and behold the next day EML came on, had it on tech 2 and had fault code for cat efficiency, the technician told me to put this stuff in tank called Cataclean which cleans the O2 sensors and cat as the car will throw up a DTC if efficiency falls below 96%, usually caused by short journeys/cheap fuel and everything getting carboned up.

    Anyway i got some £15 and put it in drove it like it had been knicked for 20 miles, EML reset, no DTC's and Passed MOT, 16 months on and it's still ok so must work.

    Not saying it will solve your problems but if you are not burning oil may be worth a punt for £15.

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    Regular Member shinyb1's Avatar
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    Default

    forte gas treatment is good aswell .

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    Default

    1.8 can be hard on rings, and judging by the HC reading this might be the case.

    Quote Originally Posted by lutonmatt View Post

    a 1.8 vauxhall lump will always burn oil always have done
    Not always the case. My 1.8 uses no oil between changes, ok thats only 4000 miles, but when you consider Alfa recons you should check the oil every time you fill up, id say 4k is pretty good going without a top up.

    Just grabbed my last 2 MOT's. C0 0.01, HC 0ppm & C0 0.09 & HC 30ppm

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    Default

    My english is not good enough to really understand what is said here above, but is a 1.8 petrol always an oil user? Or is there a difference between the 'old' z18xe 122bhp engine and the newer z18xer 140bhp engine? I drive a z18xe with 142.000km and it did use some oil in a short period of time when the wife was doing short trips over and over, but after servicing it is the old engine again with almost no oil use between services (20.000km, only 1 litre per time).
    About the emissions: I heard something about Opel having problems to get the z18xe(r) engines meet the emission standards? So it is always a close call when it is checked MOT?

    Kind regards,

    Aad ~ Doix
    The Netherlands

  7. #7
    Regular Member m8internet's Avatar
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    Default

    Sounds very similar to my second Vectra B
    The dealership had no idea why it failed the MoT (and I disputed it)
    Took the car to the dealership I normally use (same company) and they found the issue within 15 minutes
    The centre exhaust baffles had failed, a new centre section was required
    I was also given an advisory for the downpipe (this failed 2 months later)

    Have the complete exhaust system examined

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