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Thread: My flat spot cure

  1. #1
    Regular Member neill's Avatar
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    Vehicle InfoStats

    Vehicle : Vectra C estate

    Trim : SRI

    Engine : Z19DTH

    Year : 2008

    Mileage : 79000

    Default My flat spot cure

    After a few months of driving my z19dth with a really bad flat spot upto 2k, I've finally sorted it.

    Strange thing is I wasn't trying to fix it, just doing a service.

    I've replaced

    Oil
    Oil, Air and fuel filter

    And for some reason she now flies from takeoff, and there's no hesitation whatsoever.

    I can only assume it was the air filter that was restricting and causing the very bad flat spot, but either way I'm chuffed it's finally gone!!

    Has anybody else cured there flat spot after a service??

  2. #2
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    Vehicle : saab 93 tid(150)

    Trim : sport

    Engine : 1.9 z19dth

    Year : 2005

    Mileage : 63000

    Default

    Quote Originally Posted by neill View Post
    After a few months of driving my z19dth with a really bad flat spot upto 2k, I've finally sorted it.

    Strange thing is I wasn't trying to fix it, just doing a service.

    I've replaced

    Oil
    Oil, Air and fuel filter

    And for some reason she now flies from takeoff, and there's no hesitation whatsoever.

    I can only assume it was the air filter that was restricting and causing the very bad flat spot, but either way I'm chuffed it's finally gone!!

    Has anybody else cured there flat spot after a service??
    What state was your fuel filter in do you think it could have been that?

  3. #3
    Regular Member neill's Avatar
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    Vehicle : Vectra C estate

    Trim : SRI

    Engine : Z19DTH

    Year : 2008

    Mileage : 79000

    Default

    It's possible, but my air filter was filthy, so that's why I assumed it was the air filter.

  4. #4
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    Vehicle : saab 93 tid(150)

    Trim : sport

    Engine : 1.9 z19dth

    Year : 2005

    Mileage : 63000

    Default

    Reason why i ask is im about to change my fuel filter as im getting crap mpg and on acceleration at times feel like the engine is holding back, have you noticed any improvement to mpg?Glad you sorted it though fella

  5. #5
    Regular Member neill's Avatar
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    Vehicle : Vectra C estate

    Trim : SRI

    Engine : Z19DTH

    Year : 2008

    Mileage : 79000

    Default

    My mpg appears to be the same as before so couldn't really say. Will give it a week or two

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