JayCarr
Member
Registered: 19th Dec 02
Location: Cambs Drives:M3 & X3
User status: Offline
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My cars had 5 or 6 MOT's now and it keeps failing on the emissions 
So far I've replaced the following:
Lambda
temp sensor
temp sendor
Thermostat
water pump
cam belt
fan switch
sump gasket
oil
oil filter
Taken the inlet apart and cleaned it
And still the emissions are way to high. Im thinking the piston rings have gone  Any one got any idea of what it could be?
Would it be better to put my tb's on and get it all set up then try to get the MOT?
Thanks, Jay
[Edited on 31-03-2006 by JayCarr]
[Edited on 24-04-2006 by JayCarr]
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richysport
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Registered: 15th Apr 05
Location: Flintshire, north wales
User status: Offline
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new cat may help
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JayCarr
Member
Registered: 19th Dec 02
Location: Cambs Drives:M3 & X3
User status: Offline
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only had a new cat last MOT so i dont think its that, i hope its not anyway!
Its also got a small standard exhaust on it rather than my big stainless powerflow one.
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paulo89
Member
Registered: 28th Mar 06
User status: Offline
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wot r the emissions reading? if it lambda check 4 blowing, but mind u it wud fail the mot if it woz blowin 2 much, try that anyway
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hopper
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Registered: 14th Apr 02
Location: Stoke-on-Trent
User status: Offline
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i take it your running a 2ltr by your sig, has the air flow meter been messed with at all,
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JayCarr
Member
Registered: 19th Dec 02
Location: Cambs Drives:M3 & X3
User status: Offline
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the lambda is tight in there, coz as you say it should of failed on blowing exhaust otherwise. Its the carbon reading thats high which is why i thought it might be oil coming out the exhaust?
Yeah its a 2litre c20xe, what do you mean by messed with? its got a power cap on it and a pipercross viper.
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Wrighty
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Registered: 28th Feb 04
Location: Howden
User status: Offline
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standard airbox may help.possibly?
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Tiger_kpt
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Registered: 2nd Apr 05
Location: Retford, Nottinghamshire
User status: Offline
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A high carbon reading is either down to the burning of oil or the incomplete or un-burning of fuel.
Oil Related could be = faulty piston rings, valve stem seals, etc.
Fuel related could be = something as simple as a dodgy spark plug or HT lead. Or something like a dodgy ingition coil/distributor or maybe an injector (injector dribble). Anything causing a misfire basically. Even the timing on an engine being slightly out may mean that not all of the fuel is being unburnt.
Just hope that your car isn't ejecting unburnt fuel though, as you won't just have to sort out the component responsible for it but more than likely have to buy a new CAT too. As unburnt fuel through the exhaust + heat = mini explosions = smashed up CAT reacting plates.
How high was the Carbon over the upper legal limit?
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Tiger_kpt
Member
Registered: 2nd Apr 05
Location: Retford, Nottinghamshire
User status: Offline
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Try doing a compression test also. Both dry and wet. Will give you a much better idea of where you should be looking.
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JayCarr
Member
Registered: 19th Dec 02
Location: Cambs Drives:M3 & X3
User status: Offline
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i'll go and find the MOT failure certificate now and tell you the readings.
I hope that the cat is wrecked cost £300 last MOT and already spent that trying to get it through this year!!!!
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JayCarr
Member
Registered: 19th Dec 02
Location: Cambs Drives:M3 & X3
User status: Offline
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This is the emissions results from the other week. its since had the water pump, temp sensor, cam belt done. and still way over on co.
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SportBoy
Member
Registered: 5th Oct 01
Location: Retford, Nottinghamshire
User status: Offline
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you got another air flow metre to use?? my money is on that
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JayCarr
Member
Registered: 19th Dec 02
Location: Cambs Drives:M3 & X3
User status: Offline
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no i haven't got one. could buy one though from vauxhall. should i do a compression test first? Could save me some money?
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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have you had it checked to see if its running rich? do the plugs look black and sooty?
i would start with getting the fuelling checked to see if it is running too rich as without knowing that its down to guesswork.
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jr
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Registered: 20th May 02
Location: Kent
User status: Offline
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bring it to me, i'll get it mot'd 
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boyracer2002
Member
Registered: 10th Aug 02
Location: West Yorkshire
User status: Offline
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 jr
Was going to say u2u me for it mot'ing 
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JayCarr
Member
Registered: 19th Dec 02
Location: Cambs Drives:M3 & X3
User status: Offline
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if i get desperate then it might need a dodgy one
Corsa808: the plugs are very black and sooty yes, they're never wet though. how can i adjust the fueling so its not running rich?
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Adam_B
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Registered: 13th Dec 00
Location: Lancashire
User status: Offline
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on the air flow meter theres a little screw under a cap, im sure if you fiddle with this it has an effect on the emissions. Never adjusted it myself tho.
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SVM 286
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Registered: 13th Feb 05
Location: pain
User status: Offline
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quote:
Originally posted by jr
bring it to me, i'll get it mot'd
 How you gonna manage this you f*cker?
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James R
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Registered: 4th Feb 03
Location: 205GTi16/306GTi16
User status: Offline
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Apart from the fact a 2L corsa isn't on the emissions computer so should need all this.
High CO indicated it's running lame on a cylinder, I'd pull out the plugs and clean them up, make sure you give some abusebefore you get there and £10 of optimax and failing that hotter grade plugs.
Waht does the car idle at?
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hitman2k
Member
Registered: 27th Aug 03
Location: West Midlands
User status: Offline
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quote:
Originally posted by SVM 286
quote:
Originally posted by jr
bring it to me, i'll get it mot'd
How you gonna manage this you f*cker?
run emmisions on another car.... loads of garages do it for cars with out cats!
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JayCarr
Member
Registered: 19th Dec 02
Location: Cambs Drives:M3 & X3
User status: Offline
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car idles at around 1000rpm.
i gave the plugs a good clean before the mot too. i'll have a look at the little adjuster screw thingy then.
I was running super unleaded in it when MOT was done.
really annoying me now as the mot ran out 4th february!
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Gregor
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Registered: 28th Nov 03
Location: Paisley, Renfrewshire
User status: Offline
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What have they said at the MOT centre , do they have any ideas ?
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JayCarr
Member
Registered: 19th Dec 02
Location: Cambs Drives:M3 & X3
User status: Offline
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it was MOT'd at vauxhall twice, and now they're saying there's nothing they can do to fix it because its had an engine conversion and cant plug it onto tech2! They did say that they could change parts they think it might be until they got the right part, said it could run into thousands to fix no thanks
they told me to take it somewhere that specialises in modified cars basically.
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Gregor
Member
Registered: 28th Nov 03
Location: Paisley, Renfrewshire
User status: Offline
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What does a conv have to do with the tech 2 not being used ?
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