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Thread: Engine management problem :(

  
  1. #1
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    Engine management problem :(

    hey guys!

    I've got a 1.6 8v Astra club - 2001...
    i recently got the dreaded orange light on the dash telling me the engine needs inspecting.

    One of my friends has the diagnostics thingymebob so we checked it out and it turns out my idle control valve was showing either "Not present" or "Not Activating".

    The engine manegement isnt on constantly... when i first start the engine it is fine, but if i am waiting at traffic lights for example the car is idling high, at around 1200-1300rpm.
    If its doing this for more than a minute or two, the light comes on and it starts to 'shudder' a bit tilli i start moving again - after which the light remains on for the rest of the journey.

    I got hold of new idle control valve and fitted it today, but the problem persists even after the new valve has been fitted.
    I have tried 2 new valves in total today and am now getting nowhere fast.

    Can anyone give me any ideas or suggestions how i can resolve the problem or even what the problem might be??

    Thanks guys!!

    Muckerz

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    were they cheapie ICVs you used? cheapies i find are shite at best- i fitted 2 cheapies to a mates one before settling on a genuine Delphi branded part - now it works a treat - the £10 specials off ebay are utter shite

    you could also clean the throttle body and EGR valve - both guides can be found in the how-to section albeit not shown on your 8v but the principle is the same

    if u have an ICV then it will be the early X16SZR engine which was only in production until 2000 so im guessing yours was a late registered model - irrelevent i know but just saying

    the later Z16SE from 2000-2004 did not have an ICV so the fact youve replaced it suggests its the earlier engine



    Id still be tempted to buy a genuine ICV tho in the meantime - mine was had from ebay via a Vxl specialist

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    Quote Originally Posted by GeordieBandit View Post
    were they cheapie ICVs you used?
    Not really.... firstly i bought a brand new one from Andrew Page for £24.
    It seemed to be fairly decent build quality judging by appearance and what not.

    After that didnt work, i swing by the local scrappies and took a standard vauxhall one of an 8v astra estate (identical part) and tried that one too... also to no avail.

    you could also clean the throttle body and EGR valve - both guides can be found in the how-to section albeit not shown on your 8v but the principle is the same
    Tried this one when i went to see my mate from VVOC - he cleaned it all right up for me, but again it made no difference.
    We'd originally hoped that cleaning the valve off might free it up again enough for it to start working.... no such luck!![/quote]

    if u have an ICV then it will be the early X16SZR engine which was only in production until 2000 so im guessing yours was a late registered model - irrelevent i know but just saying

    the later Z16SE from 2000-2004 did not have an ICV so the fact youve replaced it suggests its the earlier engine
    haha - cool! cheers for the fyi


    Id still be tempted to buy a genuine ICV tho in the meantime - mine was had from ebay via a Vxl specialist
    You think its still worth trying another one after the two i've tried already?
    as i mentioned, the 2nd one was a standard vauxhall part and what are the chances that the astra in the scrappies had the sam fault on the same part?

    I just want it to work normally again!! Lol
    This is the car's way of getting me back for thinking of flogging it!!

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    the ICV is a common failure on the 8v especially so finding a knackered one in a scrappy aint that rare - especially given that these engines last saw service back in 2000

    This is the one i fitted to my mates car and eventually fixed the problem

    http://cgi.ebay.co.uk/Vauxhall-Idle-Valve-17112031-CorsaB-AstraMK3-AstraMK4_W0QQitemZ190275690898QQcmdZViewItemQQptZU K_CarsParts_Vehicles_CarParts_SM?hash=item19027569 0898&_trksid=p3286.c0.m14&_trkparms=72%3A1683|66%3 A2|65%3A12|39%3A1|240%3A1318|301%3A1|293%3A1|294%3 A50

    Obviously I cant guarantee it will 100% fix your problem but the fact the EML is highlighting the ICV as the cause and pattern/2nd hand units dont seem to be helping then its the only thing I can suggest.

    Did you actually remove the TB itself from the car? Might be an idea to see if theres any other hindrance or blockage in some way?

    Yes, you guessed it im running out of ideas

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    Quote Originally Posted by GeordieBandit View Post
    the ICV is a common failure on the 8v especially so finding a knackered one in a scrappy aint that rare - especially given that these engines last saw service back in 2000

    This is the one i fitted to my mates car and eventually fixed the problem

    http://cgi.ebay.co.uk/Vauxhall-Idle-Valve-17112031-CorsaB-AstraMK3-AstraMK4_W0QQitemZ190275690898QQcmdZViewItemQQptZU K_CarsParts_Vehicles_CarParts_SM?hash=item19027569 0898&_trksid=p3286.c0.m14&_trkparms=72%3A1683|66%3 A2|65%3A12|39%3A1|240%3A1318|301%3A1|293%3A1|294%3 A50

    Obviously I cant guarantee it will 100% fix your problem but the fact the EML is highlighting the ICV as the cause and pattern/2nd hand units dont seem to be helping then its the only thing I can suggest.

    Did you actually remove the TB itself from the car? Might be an idea to see if theres any other hindrance or blockage in some way?

    Yes, you guessed it im running out of ideas
    ok, bit of an update - my Opcom arrived today so i put the new IDC on and did the activation tests through op-com.
    it works fine... strangely so does the old one tho! and the one i got from the scrappies.

    Engine speed was jumping around between 1200 and 1500 rpm.
    After a minute or two the warning light kicked in and the shuddering began.

    heres the strange bit, when i activated the EGR pulse test or whatever its called, the engine speed dropped right down to 875rpm and idled around that mark, and the shuddering stopped.

    I am wondering if its possibly the EGR valve thats causing the problem, but opcom is reporting the IDC because the IDC is the component which is picking up on the fault.

    what do you think guys?

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    bumpy bump?

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    bump....anyone?

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    you need to get your mate to reset your fault code with his diagnostics machine and it will be fine. The light would eventualy turn off if you have fixed the problem but wont straight away. So have a word with your mate and this should fix the problem.

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    Quote Originally Posted by ttam69r View Post
    you need to get your mate to reset your fault code with his diagnostics machine and it will be fine. The light would eventualy turn off if you have fixed the problem but wont straight away. So have a word with your mate and this should fix the problem.
    I've got my own opcom now and have reset the code several times, but it just appears again moments later!

    theres an underlying problem that isnt the idle control valve and i'm thinking it could possibly be the exhaust gas recirculation (EGR) valve...

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    Hi mate, i had exactly the same issues with a 1999 'v' plate Astra i used to own with the x16szr engine and you are sort of right that the egr is what is throwing up the fault. but i changed this and it still persisted. turned out that vauxhall had big problems with the ECU on this model engine throwing codes up, and my dealer changed my Ecu for an updated version for free. but this only applies if the car is under a certain age and mileage. i buy all my vauxhall parts from autovaux, they are superb and offer genuine vauxhall parts at a fraction of the dealer prices.
    cheers Johno

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