Emissions Fail.. What to replace/fix
In short, its failing on fast idle test, where CO is concerened. Looks all good apart from that.
it says: Test One: fast Idle test Limit Actual Value CO =<0.2% 0.51% HC =<200ppm 38ppm Weird symbol 0.97-1.03 1.004 Test Two: fast Idle test Limit Actual Value CO =<0.2% 0.41% HC =<200ppm 22ppm Weird symbol 0.97-1.03 1.002 Natural Idle Test CO =<0.3 0.12% What would this indicate? Faulty CAT? If anyone can help, its much appreciated. Need to get it re-tested on Friday. Can't see me getting it fixed in time :( |
Is it a sports cat? They need to be warm to work.
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It's only failing on CO (by not much).
As above, you need to give the car a good thraping so as to 'ignite' the cat and then get it on the machine asap. That tactic worked when I had the same situation (on my old WRX). |
Originally Posted by F1 CJE UK
(Post 11145613)
Is it a sports cat? They need to be warm to work.
Its a turbo 2000 (my00) with PPP. So i imagine prodrive have fiddled with some element of the exhaust system. Ive no idea though. All standard as far as I am aware. The car was warmed up properly and re-tested, but still failed, so temperature doesn't appear to make much difference. |
Originally Posted by joz8968
(Post 11145625)
It's only failing on CO (by not much).
As above, you need to give the car a good thraping so as to 'ignite' the cat and then get it on the machine asap. That tactic worked when I had the same situation (on my old WRX). NO worries on that :D |
When I had mine done, Zen Performance put it in to the MOTer on my behalf.
Paul Blamire, gave it the 'Italian driving' method :D, and it lowered the CO to almost zilch! :eek: And this was only on a small centre cat too - swapped in place of the 3" decat centre pipe, just for the MOT. ;) (The downpipe was a full decat job and left in place). |
Make sure you haven't got a hole in your exhaust somewhere, I had the same problem, MOT testers spanner monkey covered small hole with a rag and hey presto emissions came back into tolerances...............
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...Of course, your CO 'issue' could be related to other items, such as the lambda sensor, plugs or MAF.
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Originally Posted by spender(again)
(Post 11145641)
Make sure you haven't got a hole in your exhaust somewhere, I had the same problem, MOT testers spanner monkey covered small hole with a rag and hey presto emissions came back into tolerances...............
Its failing, but not by much. I think a general tighten up of everything tonight, then a run out. Is it worth resetting the ECU before taking it for a rag? Maybe if it re-learns it might re-learn more efficiently :D |
And thanks for the help. Well done team! :D
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Take it for a good high speed run , if you have been driving round a lot short journeys off boost it will need a good blow out ! mine was the same at mot time !! i was on a good run day before and it sailed through this year ! other than that take it to a frendly mot man , who might give you a donor car for the emmisions !!;):thumb:
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Originally Posted by HAGGY
(Post 11145688)
Take it for a good high speed run , if you have been driving round a lot short journeys off boost it will need a good blow out ! mine was the same at mot time !! i was on a good run day before and it sailed through this year ! other than that take it to a frendly mot man , who might give you a donor car for the emmisions !!;):thumb:
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Originally Posted by Jazzy Jefferson
(Post 11145733)
Silly question, whats a "good run" ? I did 30 miles of back roads the night before last emission test. still failed. :(
Antilag will heat it up nicely. Or find a friendlier tester. |
Originally Posted by mickywrx
(Post 11145821)
Of course it's going to fail, the sports cat needs to be very hot when the emissions are tested.
Antilag will heat it up nicely. Or find a friendlier tester. |
If it is 100% PPP then yes you have a sports cat. As long as a previous owner has not removed it.
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Originally Posted by hpoolsteve
(Post 11146253)
If it is 100% PPP then yes you have a sports cat. As long as a previous owner has not removed it.
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on the drive to the MOT give it a hard drive, as people have said my sports cat failed 1st time round. went to another mot place warm and it passed.
My car doesn't have a cat now but it still seems to do OK on emissions :thumb: maybe you need a better MOT place |
I've had the same issue a few times .. it was all about the heat of the Cat.
Warm just isn't enough - it had to be scorching to pass |
Originally Posted by T20Driver
(Post 11146582)
...the heat of the Cat...
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Originally Posted by F1 CJE UK
(Post 11146438)
on the drive to the MOT give it a hard drive, as people have said my sports cat failed 1st time round. went to another mot place warm and it passed.
My car doesn't have a cat now but it still seems to do OK on emissions :thumb: maybe you need a better MOT place Fingers crossed for tomorrow. Shall post the results. Thanks for the help. |
Retested. Failed :(
Took it out on a 30 mile fast motorway journey before hand, so nice and warm. Best result was 0.48% CO. I guess new cat? |
Originally Posted by joz8968
(Post 11146616)
Sounds like a cue for an Al Stewart song. ;)
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Originally Posted by Jazzy Jefferson
(Post 11147497)
Retested. Failed :(
Took it out on a 30 mile fast motorway journey before hand, so nice and warm. Best result was 0.48% CO. I guess new cat? Best to start changing the cheapest things first: 1) Second-hand OEM catted downpipe (cheap as chips - unless you must have the Prodrive PPP one). 2) New plugs (around £30-40). 3) MAF (MY99/00 OEM ones just require the sensor cassette @ c.£80). 4) Lambda sensor (pukka OEM ones are around £250-300! - but will last). You can test to see if the lambda's voltage is cycling correctly; just do a search and it'll become clear. ...Or sack all the above and simply go seek out a 'empathetic/sympathetic MOTer.'... ;) |
Originally Posted by T20Driver
(Post 11147499)
:luxhello: .. and what a great song too ...
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