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Thread: Help please engine problems

  1. #1
    Regular Member 11mallard's Avatar
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    Default Help please engine problems

    Sorry this post is a bit long but I would really appreciate some help with an engine problem. Its a 1.8 Vectra Club of 2003 vintage. 77,000 on the clock and regularly serviced. Over the past year have replaced the EGR, Front Cat together with O2 Sensor and Cam Sensor. Serviced 2 months ago with new air filter, GM part synthetic oil and filter, I tend to do the oil at least once a year if not sooner, left the plugs as they were only 6 months old, Bosch Super 4's. Recently getting P0420 Catalyst System Efficiency Below Threshold (Bank 1) Clear the code and O.K. for a week and its back. She is holding back, like a hesitation when puling away as if missing a couple of beats then picks up with a jerk. Also had a code the other day saying rich mixture? Otherwise engine is really smmoth and quiet.
    Suggestions please.

  2. #2
    Regular Member 11mallard's Avatar
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    Default Is anyone out there?

    Anyone othere able to help please
    Quote Originally Posted by 11mallard View Post
    sorry this post is a bit long but i would really appreciate some help with an engine problem. Its a 1.8 vectra club of 2003 vintage. 77,000 on the clock and regularly serviced. Over the past year have replaced the egr, front cat together with o2 sensor and cam sensor. Serviced 2 months ago with new air filter, gm part synthetic oil and filter, i tend to do the oil at least once a year if not sooner, left the plugs as they were only 6 months old, bosch super 4's. recently getting p0420 catalyst system efficiency below threshold (bank 1) clear the code and o.k. For a week and its back. She is holding back, like a hesitation when puling away as if missing a couple of beats then picks up with a jerk. also had a code the other day saying rich mixture? Otherwise engine is really smmoth and quiet.
    suggestions please.

  3. #3
    Regular Member Critch's Avatar
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    Vehicle : Mk1 renault scenic... I know I know but it drives

    Trim : Basic

    Engine : 1.6 16v

    Year : 2003

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    Maf sensor

  4. #4
    Regular Member 11mallard's Avatar
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    Thanks,

    I'll see I can borrow one from a friends Astra and see if it any better.

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