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Thread: Vectra CDTI 150 16V Diesel Purge

  1. #1
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    Vehicle : vectra c

    Trim : Sri

    Engine : Gavin

    Year : KA18

    Default Vectra CDTI 150 16V Diesel Purge

    Just done this today and makes a big difference to the car's performance.
    The injectors and fuel system was extremely dirty as you can see by the colour of the LiquiMoly as it returns to the container.
    The car is more responsive and I would certainly recommend doing this.

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    Regular Member nikroc's Avatar
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    Vehicle : 2t

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    This video is unavailable....

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    Vehicle : vectra c

    Trim : Sri

    Engine : Gavin

    Year : KA18

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    Quote Originally Posted by nikroc View Post
    This video is unavailable....
    Hi nikroc,
    I'm just uploading the video to Youtube. I didn't know it was so large a file.

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    Regular Member northpole's Avatar
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    Vehicle : Vectra C

    Trim : SXI limited edition

    Engine : 2.0 16v DTI

    Year : 2003

    Mileage : 140000

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    I thought this was common knowledge.... a diesel purge is one of the quickest ways of cleaning the injectors. I do this every year and always see the same amount of dirt coming out of the system....

    I hope you got an extra bottle to put in the tank too as the algy and water that collects in there gets removed by this stuff also.


    I do the tank first than wait until it is almost empty and than I do the injector and pump purge.... it quiets down the engine and it runs so much better right after the purge

    So I advise you to do this once a year. You won't regret it

    Sent from my SM-G935F using Tapatalk

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    Vehicle : vectra c

    Trim : Sri

    Engine : Gavin

    Year : KA18

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    Quote Originally Posted by northpole View Post
    I thought this was common knowledge.... a diesel purge is one of the quickest ways of cleaning the injectors. I do this every year and always see the same amount of dirt coming out of the system....

    I hope you got an extra bottle to put in the tank too as the algy and water that collects in there gets removed by this stuff also.


    I do the tank first than wait until it is almost empty and than I do the injector and pump purge.... it quiets down the engine and it runs so much better right after the purge

    So I advise you to do this once a year. You won't regret it

    Sent from my SM-G935F using Tapatalk
    Yes I plan to do this more often now I see the crud that comes out of the fuel sytem.
    Next time i'm going for a smaller pump as the spare intank one I used is a bit overkill.
    Remember, this requires the fuel pump fuse to be removed prior to purging.

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    Vehicle : Vectra CDTi

    Trim : SRi

    Engine : 1.9 150bhp

    Year : 2007

    Mileage : 170k

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    Interested and being new to diesels I didn’t know this was something recommended. So what do I need and how do you set it up?

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    Regular Member northpole's Avatar
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    Vehicle : Vectra C

    Trim : SXI limited edition

    Engine : 2.0 16v DTI

    Year : 2003

    Mileage : 140000

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    you'll need LiquiMoly diesel purge (cheapest if you buy it of ebay, go for the 1 litre bottle) an inline paper fuel filter and about 3 meters of fuel pipe... if you want to do the purge how he has done it in the video...

    you can also just take out the fuel filter drain it from the bottom and fill it completely up with the product... than drop the rest in the tank, make sure you've bleed the air out of the fuel lines and start the car... it will run purely on it for at least 10 min than the fuel from the tank will come into the mix but it should be enough... because the rest is in the fuel so it'll clean it out until the tank is empty... you can mix it in on just a reserve tank if you want to it will clean it a lot faster... that said when you need to tank again... it is best to replace the fuel filter again... like i said this stuff removes water/ algy and dirt from the complete system so the new fuel filter will be dirty again

    I prefer the latter to be honest but when i just get a diesel car it is the first thing i do.... a diesel purge like how he did it in the video.. and I actually run it for 30 minutes on that stuff

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    Regular Member northpole's Avatar
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    Vehicle : Vectra C

    Trim : SXI limited edition

    Engine : 2.0 16v DTI

    Year : 2003

    Mileage : 140000

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    Oh and I forgot to mention you'll want to use a lift pump for the cdti engines.... the dti's can do without it.

    Sent from my SM-G935F using Tapatalk

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    Lift pump?

  15. #10
    Regular Member northpole's Avatar
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    Vehicle : Vectra C

    Trim : SXI limited edition

    Engine : 2.0 16v DTI

    Year : 2003

    Mileage : 140000

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    a fuel-pump (fluid-pump)... but if you look at the video, he used a spare in-tank fuel-pump to make sure the common rail get's the fuel at enough pressure.... the DTI's have a mechanical fuel pump (ran of the timing-chain) that will suck the fuel up without a problem but the common rail needs a certain amount of pressure on the fuel... but i have seen people do it without a fuel-pump on CDTI's...

    if you don't want to go and buy all the stuff just buy 2 fuel filters... take the old one out, drain all the fuel that is in the filter housing (there is a water drain in the bottom remove it and put it back once it is empty), put in the new filter with it's seals, than fill up the filter housing to the brim, close it, put the remainder of the diesel purge in the tank (the less fuel is in there the better for shock cleaning the injectors and fuel lines)... than go and start the car... with yours being a CDTI it should bleed the air out by itself...

    raise the rpm's to 2500 for 15 to 30 minutes, it should be enough to shock clean.... now keep driving until you hit your reserve tank and do an extra 30 miles while it is showing you you need to tank... this is when you fill up with fuel and afterwards you change the fuel filter again... no need for extra diesel purge just make sure you brim the filter this time with diesel... you'll see the new filter will be very dirty but that is because the stuff has done it's job... and that should be it.

    this method is used by certain diesel specialists, when they are certain the fuel system needs a shock clean... before they go and pull the injectors and clean them ultrasonically...

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