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Thread: Reducing emissions

  
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    Reducing emissions

    Just had my mot today which the only fAil was number plate bulb and emissions @ 5% co2 ( i think) needs to reduce to under 3%, changed bulb and put an engine flush in directly into fuel filter to inject straight into the system. But still 2% off any ideas??? Cheers
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    Quote Originally Posted by lowry_uk View Post
    put an engine flush in directly into fuel filter to inject straight into the system.
    Hi lowry,

    I think you must mean you put injector cleaner (not engine flush) into the fuel filter, yeah?

    Anyway, I'm not convinced that those products would do the trick, so I reckon it might be worth having the injectors serviced and spray pattern checked by a specialist with a spray booth.

    Cheers, Paul

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    Hi how much you reckon this would cost??? also would a engine service such as filters, oil change etc would work???
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    I've heard you can get the injectors serviced cheaper in the UK than you can down here - I think somebody was saying about 25 quid per injector or something like that. If its a complete rebuild it would be more expensive - a diesel specialist I deal with said it depends on the injector. Had my old injectors rebuilt and that was costly - the guy said the Bosch parts were dear.

    A general service for your engine is always a good thing. I can imagine a somewhat fouled fuel filter could restrict flow and effect performance but don't know how that would effect emissions. Done the fuel filter recently? Or how about the air filter - dirty one could restrict air flow.

    And that just made me think of the EGR system and intake manifold. I Googled your engine just now and saw a diagram of the intake manifold. Looks fairly easy to dismantle and clean the crap out of that. I realise you don't have the EML light showing and fault code indcating EGR valve, just thought you could consider cleaning both intake manifold and EGR valve.

    Having your injectors cleaned/serviced, new air and fuel filters, and maybe clean out your intake manifold and EGR valve while your at it might make enough of a difference for your MOT emissions test. I'm just guessing really, but at least it would rule out those things...

    ------------

    p.s. here's an old thread on this forum on the Y20DTH EGR valve with that intake manifold diagram
    http://www.astraownersclub.com/vb/sh....php?p=1913248
    is yours a Y20DTH?

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    Hi thanks for the comprehensive details. I will give the cheaper option a go first, drop and change the oil, new filters alround. I forgot to add I did clean out the egr valve aswell that wasn't too bad as it is only 9 month old. My mechanic mate also said there could be a fuel mixture fault as the turbo might carrying too much fuel thru cause the unburnt fuel to fail the emission test. what do you reckon?? Thanks in advance
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    The diesel smoke test should be no more than 3% opacity, do as paul has sugested and change the filters. I may help to know if you are getting any smoke and if so what colour it is? i.e black, grey, white or blue. I hope the vehicle engine was up to full operating temp 80deg before the smoke test was carried out as the emmisions may well be high until this temp is reached,if you are not getting operating temp check out the thermostat is fitted and working; also check all air intake ductings are secure and unrestricted, this also goes for all the vacuum lines.

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    Hey Spedo, thanks for mentioning opacity - I was wondering if that was in fact an opacity test being referred to and not CO2 as stated. I would imagine that CO2 would probably be a lot higher than just a couple of percent as it is the product of combustion.

    I was thinking that another possible way to reduce opacity for a MOT test might be to try running on a biodiesel mix as it is widely reported to significantly reduce emissions. I ran my old Astra on biodiesel for a couple of years and I swear you could see the difference.

    Anyway as far as opacity goes we get off lightly here in NZ. Lot of old smokey diesels about and hard to believe there's no testing for emissions.

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    LOL i might bring it over there for an MOT lmao. I was told that today Shell do an expensive diesel im sure its biodiesel. Thanks lot just ordered a service filter pack oil, air, fuel etc. Gunna drop the oil etc should go through with all that............ I hope.

    I sincerely thank you and spedo for your time in trying to help me, the advice has been A1 i will let you know if it goes through. WATCH THIS SPACE @ 6PM MONDAY EVENING GMT lol
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    Quote Originally Posted by paul.spencer View Post
    Hey Spedo, thanks for mentioning opacity
    Anyway as far as opacity goes we get off lightly here in NZ. Lot of old smokey diesels about and hard to believe there's no testing for emissions.
    Paul
    I find this info incredable given your strict enviornmental rules on everything else, I watch a New Zealand programe called Boarder Control where they want to fine people for keeping fish they caught with their fishing rods that are too small, talk about over kill; better not show the environmental people this thread or your diesel will be up for the chop LOL.

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    Hey I watch that show too. They are pretty serious about fishing regs - overlimit and undersized fish and shellfish. We just moved to a seaside place where the fisheries people do stakeouts - I'll be watching for that.

    As I drove down here, about 8 hr drive from Auckland, I saw a number of really old diesel farm vehicles labouring up some big hills bellowing out huge black clouds of smoke. My Astra puts out very little at all in comparison. We have a 6 monthly WOF (warrant of fitness), but its just mechanical, doesn't include emissions testing at all. They used to do MOT/WOF including some emission testing in Canada but they stopped any testing at all in 1982 - that was the last sticker on my old Toyota.

    Here in NZ there was some talk months ago about imposing tough new rules regarding emissions for the old smokies. Haven't heard anything else about it since then. They are rather tough about environmental things so I suspect one day soon things will change...

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