dean101287
Member
Registered: 22nd Jul 07
Location: Cardiff
User status: Offline
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Had MOT today and it failed on emissions.
Iv changed the lambda and Cooland temperature sensor, CAT is all in one piece as it doesnt get used alot due to decat being in.
So what do I change next? Any ideas?
MOT guy said that 1 second it would be overfueling and next it would drop down. Told me to change the CTS, I did and it got better but still not there.
Please help 
[Edited on 20-03-2009 by dean101287]
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Torsa g
Member
Registered: 20th Sep 07
Location: Tamworth. Rides: An OSTRIDGE
User status: Offline
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give the thing complete death before the mot
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dean101287
Member
Registered: 22nd Jul 07
Location: Cardiff
User status: Offline
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He has tried that. Keeping the revs high then letting it drop, take readings, FAIL. Tried about 5 times and wouldnt come down. Said its a sensor probably.
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flybikeslee
Member
Registered: 2nd Jan 07
Location: Liverpool
User status: Offline
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friendly mot
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FruitBooTeR
Member
Registered: 18th Jan 07
Location: Wolverhampton Drives: S15
User status: Offline
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How much is it failing by?
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dean101287
Member
Registered: 22nd Jul 07
Location: Cardiff
User status: Offline
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Not too much. Infact very little but thats with him trying very hard to get it through.
Lee- The friendly MOT garage has recently shut down and I dont know any more
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flybikeslee
Member
Registered: 2nd Jan 07
Location: Liverpool
User status: Offline
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redex? addative stuff from halfrauds?
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dean101287
Member
Registered: 22nd Jul 07
Location: Cardiff
User status: Offline
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Tried CLEANACAT and dint work. Any other sensors that could be related?
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Richardhhha
Member
Registered: 29th Sep 07
Location: Croydon, Greater London
User status: Offline
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map sensor could do it... i have the same problems mate... you running a induction kit or pannel filter?
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dean101287
Member
Registered: 22nd Jul 07
Location: Cardiff
User status: Offline
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Standard pannel filter. Dbilas inlet tho.
Did a map sensor sort yours then?
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Richardhhha
Member
Registered: 29th Sep 07
Location: Croydon, Greater London
User status: Offline
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dont know lol just got one today to see as the next step is fuel regulator then pump
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dean101287
Member
Registered: 22nd Jul 07
Location: Cardiff
User status: Offline
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Let me know the outcome. Im gunna try some wynns additive for the next one and then I dont know what. He thinks its a sensor because the way it varies but doesnt know what one.
Going to take it to a 'specialist' tomorrow to see what he thinks of the figures. Try get some free advice.
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Richardhhha
Member
Registered: 29th Sep 07
Location: Croydon, Greater London
User status: Offline
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i really need the car to be looked at by someone whos a specialist, i ned to know if its getting the correct fuel pressure at the injectors, are the injector times constant and not al over the place, all things like that.
thinking when i get a exhaust manifold for it i'll get it remaped with a set of arp's
so that it will have a mapping set so it can pass its emissions.
will let you know the outcome with my sensor swapping.
think i got a bargen today
1 lower section of air box
1 cts (practicaly new)
1 MAP sensor (practicaly new)
1 drive belt tensioner pulley (looks new)
all for £10
still need a rear interior light bloody scrappers didnt have one
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S@M
Member
Registered: 3rd Oct 07
Location: East Yorkshire
User status: Offline
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yes wynns in the purple tub worked for me.... and a bit of exhaust sealent around the joints as it was drawing in a bit of air
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Richardhhha
Member
Registered: 29th Sep 07
Location: Croydon, Greater London
User status: Offline
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will have to try get some of that fuel treatment if its anygood
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dean101287
Member
Registered: 22nd Jul 07
Location: Cardiff
User status: Offline
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Yea im going to check for leaks in the exhaust tomorrow aswell. Used that wynns stuff last year but I changed the sensors at the same time so didnt know what did it. I will get the readings up tomorrow aswell.
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3i_gaz
Member
Registered: 29th Nov 07
Location: Liverpool
User status: Offline
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yeah sounds like it could have a leak on the exhaust dude,
shame your so far away could of got you a pass
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dean101287
Member
Registered: 22nd Jul 07
Location: Cardiff
User status: Offline
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UPDATE:
Went to the garage today and he looked at the reading and said lambda. I said that its been done and he said leak in the exhaust then.
Soooo... I got home and checked and the only bit that was leaking was the thing that goes on the manifold SAI i think it is?
Wasnt bad at all but could see black around it. Took it off, made a gasket out of old an old inlet gasket and put it back on.
Rekon that could be it? Dont wana keep going to the MOT station with FAILs because he's gunna start charging me i think 
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VegasPhil
Premium Member
Registered: 16th Jan 05
Location: Fareham, Hants Drives: Octavia VRS
User status: Offline
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My X16XE was sat at about 6krpm before it got hot enough to pass.
Need to leave it there for about 5 mins.
Corsa 2.0 16v Vegas - Sold
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rorky
Member
Registered: 28th Apr 08
Location: Wilmslow, Cheshire
User status: Offline
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did have the same problem about 4 yr ago with a x1.6 in my old car the (friendly) tester said the cat needs a few miles on it to get it working to emission standards, put about 120 motorway miles on it up and down the M56 it passed the next day
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dean101287
Member
Registered: 22nd Jul 07
Location: Cardiff
User status: Offline
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My mate said to get to the garage and when outside to disconnect an injector. The car will run like a bag of shit but it wont overfuel so therefore will pass emissions. May try it
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Markus
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 19th Nov 07
Location: Beverley - East Yorkshire
User status: Offline
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they could fail it for idling " irratically " ( spelling )
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forfarcorsa
Member
Registered: 12th Oct 08
Location: Forfar, Angus
User status: Offline
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Might be your EGR valve mate try that
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dean101287
Member
Registered: 22nd Jul 07
Location: Cardiff
User status: Offline
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Hmmmm, mite give it a try and se what he says. Not going to be egr because I have blocked it off. If it fails again I will be splitting it and getting a golf tdi and 
[Edited on 22-03-2009 by dean101287]
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