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Thread: mass air flow sensor

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    Default mass air flow sensor

    hi everyone, 1st post here goes, ive changed the mass air flow sensor on my vectra sxi, but now the revs won't settle when the car is just ticking over, the revs fall to 500rpm then shoot up to 2000rpm, then after a few times of doing this the revs settle on 650rpm, plus as i approach a junction the revs go that low the car stalls. any ideas whats wrong and what do i have to do to get it running smoothly again, any help would be greatly appreciated, thanks

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    Not sure why you changed it but if it happened after you fitted the new one then re-do the sensor again and check connections.

    If you search the site you may get the answer that way. Good luck

    Admin - wrong section please change.

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    Quote Originally Posted by vectra craig View Post
    hi everyone, 1st post here goes, ive changed the mass air flow sensor on my vectra sxi, but now the revs won't settle when the car is just ticking over, the revs fall to 500rpm then shoot up to 2000rpm, then after a few times of doing this the revs settle on 650rpm, plus as i approach a junction the revs go that low the car stalls. any ideas whats wrong and what do i have to do to get it running smoothly again, any help would be greatly appreciated, thanks

    I am not a techy but, it could be your idle control valve, I had a similar issue when I had a Vectra B, replaced this part myself and it ran spot on.

    However, it may be worth waiting for some other suggestions

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    thnx john, i changed the maf, because the engine management light came on, i took it to a mechanic i know, who put it on a computer and he told me maf was knackered, so i put a new one on (engine management light has gone off) just this revs issue now, starting to do my head in, keeps cutting out as i approach a junction, the revs won't sit on idle there up and down

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