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Thread: signum running high mpg

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    Default signum running high mpg

    ive had my signum 1.9cdti auto for 2yrs been a great car,but its start to run 1.1- 1.3mpg when the car is at a stand still.its normal 0.2- 0.4. it happens only now and again and vauxhall couldnt find a code or get it to do it.it flys when running like this but drinks tons of fuel!
    any help would be great as im not motor minded and dealer isnt intressted.
    dave

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    It's probably doing a dpf regen, my advice is to take it for a good thrapping down a motorway during this period... legally of course

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    North West Regional Organiser paulvectrac's Avatar
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    Vehicle : vectra

    Trim : vxr

    Engine : 2.8 v6 turbo

    Year : 2007

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    thats sound like my 2.2 direct lol alot of fuel as above dpf regen nothing to worrie about
    Vectra vxr custome remaps egr deletes dpf and diagnostic work all remaps are custome bench tuning avalible all genuine equipment PM for info

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    Regular Member keefy*2010's Avatar
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    Vehicle : Vectra C Facelift

    Trim : Elite

    Engine : 1.9Cdti 150

    Year : 2007

    Smile

    Quote Originally Posted by dodge2k View Post
    ive had my signum 1.9cdti auto for 2yrs been a great car,but its start to run 1.1- 1.3mpg when the car is at a stand still.its normal 0.2- 0.4. it happens only now and again and vauxhall couldnt find a code or get it to do it.it flys when running like this but drinks tons of fuel!
    any help would be great as im not motor minded and dealer isnt intressted.
    dave
    No sure if yours has a DPF (diesel particle filter) but normally during regen it goes to 1.8mpg.

    So it could be regen taking place and you should not switch engine off during this cycle, it is burning the particles out of the filter.

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    North West Regional Organiser paulvectrac's Avatar
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    Vehicle : vectra

    Trim : vxr

    Engine : 2.8 v6 turbo

    Year : 2007

    Default

    all autos have dpf mate well disels anyway
    Vectra vxr custome remaps egr deletes dpf and diagnostic work all remaps are custome bench tuning avalible all genuine equipment PM for info

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    Full Member Big Sig's Avatar
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    Another case of an incompetent dealer! Ask them about dpf regens.

    You should let it finish its cycle too rather than switch it off half way through etc.
    Now I need a turbo to keep up!

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    I cannot belive that a dealer did not come up with what is a flippin obvious answer (not offence dodge!)

    Mine does the same! 1.8MPG in the interests of the environment. great, huh?!

  8. #8
    Regular Member paul wingnut's Avatar
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    Vehicle : vectra sri 150


    Engine : 1900 cdti 150

    Year : 2008

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    yourr signum will have dpf is the glow plug light not flashing when cons is high interupted cycles will cause oil dilution a trip down the road with the revs above 2000 will bring on regen and sort it .

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    thanks every1 for your help.the glow plug light did flash but only the once.also keeps happenin,sometimes now and again but has done it for a hole day 2day running rich.when it next happens i will take it on motorway for a blast.

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    Default

    Quote Originally Posted by dodge2k View Post
    ... has done it for a hole day 2day running rich...
    Are you saying your car has been doing 1.8MPG all day?

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