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Thread: Alternator replaced but now engine management light on?

  1. #1
    Regular Member Dai69's Avatar
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    Vehicle : Vec C Estate X 2

    Trim : SRi

    Engine : CDTi 150

    Year : 55&56

    Mileage : MANY

    confused Alternator replaced but now engine management light on?

    Hi all, I had to replace the alternator, so had a couple of hours chilling on the drive in the snow yesterday afternoon. That's all fine now and the battery is charging nicely.

    Unfortunately now that the car is running again I have the engine management light on and it won't rev past 3000. I've been all over the engine bay checking all of the connections (thought maybe I'd forgotten to reconnect something or had knocked a connection) but haven't found anything obvious.



    Whilst doing the alternator I noticed that the swirl valve linkage has fallen off, so I guess that the inlet manifold needs doing. But, this wasn't causing an issue before doing the alternator, so why should it be start now?

    Please help....Any info/ ideas?

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    he dai69 i need to change my alternator ive got 1998 1.8 vectra any tips and heard ppl takeing from top off car and bottom which is the best way to do it ,also wot tools are needed thanks..

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    Regular Member Dai69's Avatar
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    Vehicle : Vec C Estate X 2

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    Hi Scouse,

    I'm not sure that any info from me will help you as mine's a 55 Veccy SRi 1.9 cdti 150, but....

    I changed mine from the top, although I did jack it up and remove the offside wheel , just to get at the tensioner and it was easier to refit the belt from there.

    The only tools needed were a couple of torx bits for the tensioner bolt and some bracketry and the airbox, a 10mm spanner for the fuel filter crash box - but you need long thin hands/arms to get at the nuts!! - and an E socket to fit the alternator mounting bolts, although I used a 14mm hexagonal socket!! (you can get away with this only if you have hexagonal sockets - bi-hexagonal will just round off the ends on the bolt giving real problems!

    Oh, I almost forgot, you'll probably need some plasters for your knuckles.

    Hope this info helps and best of luck.

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    cheers dai69 all help is apreciated and i might get a apointed first aid person on hand lol

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    Regular Member Dai69's Avatar
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    Vehicle : Vec C Estate X 2

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    Good news. The engine management etc has cured itself and is now running as well as ever - even though the manifold obviously needs doing.

    It mist have been sulking because nothing I did was curing the problem but then all faults disappear when I go for lunch?

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    confused Alternator Change

    Hi all new to here..... I had to change the Alternator this weekend,battery charging and Alternator Appears fine, however I now have the engine management light on any ideas anyone.

    Car runs fine everything appears to be working well....what did you mean about manifold needs doing?
    Last edited by Earlonics; 25th July 2010 at 09:42. Reason: redo due to wording

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    I replaced my alternator recently. The engine management light will stay on for about 10 days. After this time the fault code will clear itself and the light will go out. No need to do anything else.

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