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Thread: question on poor mpg

  1. #1
    Regular Member collyb's Avatar
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    Default question on poor mpg

    ok guys another thread from me,,,but i have come to the conclusion that my cdti sri 150 is brutal bad on fuel,,,, i mean crazy bad,,,,so heres my question,,,is it possible that when i was changing my injector seals and disconnecting my leak off pipes ,,that air could have got into the fuel lines ??? or when i was changing my fuel filter ,,,air could have got into fuel lines too ????

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    Regular Member skip85's Avatar
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    Vehicle : vectra c estate

    Trim : Design

    Engine : 1.9 cdti 150

    Year : 2006

    Mileage : 150000

    Default

    Before that has it been serviced recently and redex'd???

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    Regular Member Grumpy1954's Avatar
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    Vehicle : Ford Kuga

    Trim : Titanium

    Engine : 2.0dtci

    Year : 2014

    Mileage : 1200

    Default

    Sure there's no leaks from anything you disconnected?

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    Regular Member collyb's Avatar
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    Default

    i serviced the car fully around 1000mile ago,,,and have added redex to a full tank once or twice in the last while... and i was thinking the same about leaks,,,but i cant see leaks any where nor can i smell diesel from anywhere,,,, i had a 2litre petrol car before this,,and that was easier ran than my veccy

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    Regular Member Celes's Avatar
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    Vehicle : Opel Signum

    Trim : Sport

    Engine : 3.0 CDTI

    Year : 12/03

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    Check injector pipes. Mine weren't fully tightened up after my mechanic bled the system and diesel was leaking. I could only smell it under full throttle.

  6. #6
    Regular Member skip85's Avatar
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    Vehicle : vectra c estate

    Trim : Design

    Engine : 1.9 cdti 150

    Year : 2006

    Mileage : 150000

    Default

    Quote Originally Posted by collyb View Post
    i serviced the car fully around 1000mile ago,,,and have added redex to a full tank once or twice in the last while... and i was thinking the same about leaks,,,but i cant see leaks any where nor can i smell diesel from anywhere,,,, i had a 2litre petrol car before this,,and that was easier ran than my veccy

    Pretty sure not meant to redex that often as can cause seal issues.

    Look at back of block where egr is as I found a small leak from there.

  7. #7
    Regular Member collyb's Avatar
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    Default

    ive had a good look around the engine bay the last few days and not seen any leaks or smelled diesel from anywhere...also,,ive done the airbox mod a while ago,,,would this decrease my mpg by much ??? to be honest much of my driving is town driving wit about 5 to 10 mile of motorway driving a day,,,, and i wouldnt say i have a heavy foot either,,,,, 20 quid of diesel seems to last no lenght at all

  8. #8
    Full Member Big Sig's Avatar
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    Sorry, whats crazy bad? 20mpg?
    Now I need a turbo to keep up!

  9. #9
    Regular Member collyb's Avatar
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    Default

    well the computer is reading an average of 40 mpg mate,,,but it feels more like 20 mpg,,,,thats why i thought there could have been air in the system or sumthing leaking

  10. #10
    Regular Member Celes's Avatar
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    Vehicle : Opel Signum

    Trim : Sport

    Engine : 3.0 CDTI

    Year : 12/03

    Default

    Fill it up, empty the tank, fill up again. Write down the miles and do some calculations. You'll get a definitive answer whether it's really that bad on mpg.

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