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Thread: 2.0 turbo vectra low idle maybe misfire??????

  1. #1
    Regular Member vectra100turbo's Avatar
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    Default 2.0 turbo vectra low idle maybe misfire??????

    hi, just bought vectra edition 100 with 2.0 turbo engine.
    now it has rough idle and can feel vibration in car,
    emissions light came on, had it read and came back misfire and lambda sensor was advised change 1 of the coils as was probably a week spark as it goes if you rev it above 750rpm does not affect performance etc so i changed 1 coil and have noticed a differance in idle but did not cure it (difference now is doesnt try to cut out) does anyone have any suggestions please

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    Regular Member Caveman_nige's Avatar
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    Vehicle : Vectra and a Signum

    Trim : top of the line in both

    Engine : Z18XE,Z19DTH,Z20NET

    Year : 2006

    Default

    probably worth changing the spark plugs as well unless you know for sure when they were done etc.. unscrew the lambda sensors and clean them with brake/clutch cleaner, the first lambda sensor if on the top bend of the downpipe which is bolted to the righthand side of your turbo.. The second lambda is found after the cat and somewhere near or after the flexi join of the downpipe to the mid exhaust section..

    I would recommend cleaning you MAF sensor as well if you do all of the above.. Change your air filter and do the airbox mod.. Run some redex or similiar through the tank and treat it to some decent petrol..

    Let us know how you get on... As you do not really know how is has been maintained/treated before now you may as well assume they did sod all.. I never hurts to give it decent service like this, after all you do want it to last..

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    Regular Member Jezzy's Avatar
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    Sound advice from Nige, plus also change the fuel filter and the other three ignition coils.

  4. #4
    Regular Member nikroc's Avatar
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    Vehicle : 2t

    Trim : standard

    Engine : z20net

    Year : 08

    Mileage : 32000

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    When I got my 2T the emissions light was on. It wasnt after I sprayed carb cleaner through the intake pipe.

    Id follow the advice as given.At least youd know your starting from a good basis.

    And ENJOY!!

  5. #5
    Regular Member vectra100turbo's Avatar
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    thanks i have already done the plugs will try the sensors first does anyone know where i can get coils cheaper than £118 each can i buy the ones for the saab version of this engine the ones in it are saab ones cheers

  6. #6
    Regular Member Jezzy's Avatar
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    Find a Vauxhall dealer near you that gives "Trade Club" discounts, and ask what the TC price would be. If the discount is considerable (and it often is), then become a full member on here for £20 and you'll qualify for TC.

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