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Thread: HELP losing the will to live cdti 150 juddering

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    Default HELP losing the will to live cdti 150 juddering

    i have a vectra cdti 150 which has a slight judder when at a constant speed its doing my head in i have changed the fuel filter and put injector cleaner through it i have cleaned the egr valve and cleaned the boost sensor and this morning done the 3rd injector mod but its still the same, tha swirl valves move as they should can anybody help or give me some advice cheers as i am about to get the swan vesta out lol. craig

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    Admin & Membership Manager bigmac's Avatar
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    Vehicle : insignia

    Trim : irmscher

    Engine : 2.0 cdti

    Year : 2009

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    Have you any EML light on ?

    Irmscher Insignia CDTI 130

    MOD'S...Irmscher front spoiler, Irmscher mats, Irmscher door pins, Irmscher rear spoiler, Irmscher grille, Irmscher skirt & exhausts,Irmscher Roof spoiler MOD'S TO COME..Side skirts,Wheels

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    Regular Member the-wizard's Avatar
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    Vehicle : vectra-c

    Trim : sri

    Engine : cdti

    Year : 2004

    Mileage : 98,000

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    Did you completly strip the EGR, the inner plunger gets sticky within the shroud it travels through! marked with the yellow arrow in this pic!, the throttle body would be my next bet.
    Last edited by the-wizard; 4th September 2010 at 17:03.

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    Regular Member david.aka.judas's Avatar
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    how about giving it an italian tune up...?

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    Regular Member the-wizard's Avatar
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    Vehicle : vectra-c

    Trim : sri

    Engine : cdti

    Year : 2004

    Mileage : 98,000

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    Quote Originally Posted by the-wizard View Post
    Did you completly strip the EGR, the inner plunger gets sticky within the shroud it travels through! marked with the yellow arrow in this pic!, the throttle body would be my next bet.
    http://www.vectra-c.com/forum/showthread.php?t=105853

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    thanks for your replys i have no eml light onand i have cleaned the egr valve twice i will have another go tomorrow did you say in the pic to lubricare it with wd40 and you also mention the dpf what is this cheers.

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    Regular Member crespo's Avatar
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    maf sensor

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    i have just done the egr valve as you said and took it out for a run and fingers crossed it has done the trick i will take it for a good run tomorrow see what happens it also seems a bit quicker or is that just me thanks for all the advise. p.s sorry to sound thick but what is the maf sensor and what does it do cheers.

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    Regular Member crespo's Avatar
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    Quote Originally Posted by hitcho View Post
    i have just done the egr valve as you said and took it out for a run and fingers crossed it has done the trick i will take it for a good run tomorrow see what happens it also seems a bit quicker or is that just me thanks for all the advise. p.s sorry to sound thick but what is the maf sensor and what does it do cheers.

    It is the mass air flow sensor and it controls the intake of air into the fuel combustion. When they are on there way out they cause flat spots (hesitation) usually around 1800 - 2200 rpm espescially on diesels as this is when the turbo spools but can be at other revs. It will feel worse when lightly accelerating through this rev range or when say your sat at 70 in 6th/5th and the revs are at the point where the hesitation is. When i say hesitation i mean it feels like your car is being starved of fuel for a split second.
    You can sometimes get away with giving the MAF a clean with carb cleaner rather than replace it because they are not cheap.

    This may or may not be your problem but if it sounds familier then its worth a look.

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