Luxluc Posted August 19, 2008 Share Posted August 19, 2008 I just failed MOT emission tests this morning ... everything else was fine except : CO was between 4 and 5.5 % (0.3 allowed) Lambda value was also too high with 0.85 I run a PHR stage 1 turbo with AEM ECU and PHR stage 1 fuel system (720cc injectors) I have had my 2 cats custom done to fit between the turbo and my HKS Super Dragger exhaust. I had it tested without cats (with PHR 3" mid and downpipe) and the CO results were almost identical as with the cats on (5.8 % CO without cats). I have 2 possible problems in mind : - O2 sensor needs replacing - cats needs replacing Anybody got another idea Thanks Quote Link to comment Share on other sites More sharing options...
Wez Posted August 19, 2008 Share Posted August 19, 2008 Thats an AFR of around 12.5, thats a bit rich for the area the testing is done. Quote Link to comment Share on other sites More sharing options...
Luxluc Posted August 19, 2008 Author Share Posted August 19, 2008 Ok ... but even with a slightly lower AFR, I will never get those 0.3 % CO Quote Link to comment Share on other sites More sharing options...
bignum Posted August 19, 2008 Share Posted August 19, 2008 Oh it failed then, Quote Link to comment Share on other sites More sharing options...
Luxluc Posted August 19, 2008 Author Share Posted August 19, 2008 Oh it failed then, Yep ... have a friend at work whose cousin is working at the MOT facility I usually go ... will try again next week (after I'll meet the cousin this week-end) Seems that it ain't that easy getting singles (specially those with stand alone Ecu's) through emission tests Quote Link to comment Share on other sites More sharing options...
Wez Posted August 19, 2008 Share Posted August 19, 2008 Seems that it ain't that easy getting singles (specially those with stand alone Ecu's) through emission tests Should be easier with a standalone as you can pull loads of fuel, I wouldnt recommend this unless you know what you are doing. Am I not mistaken that you have two sports cats installed? Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted August 19, 2008 Share Posted August 19, 2008 Ok ... but even with a slightly lower AFR, I will never get those 0.3 % CO You would be surprised when the AFR is Stoich. If you have an aem wideband and Ecu the easiest thing to do would be to turn the o2 feedback on and set it at 14.7 on the cells which are used in the emission testing. They it should correct the fueling if setup right. But if its not on already in your map make sure you turn it off afterwards. Speak to the person who mapped it to find this? Quote Link to comment Share on other sites More sharing options...
Luxluc Posted August 20, 2008 Author Share Posted August 20, 2008 Should be easier with a standalone as you can pull loads of fuel, I wouldnt recommend this unless you know what you are doing. Am I not mistaken that you have two sports cats installed? Yes ... I have had the OEM cats modified so that they fit between the PHR turbo and the HKS exhaust. They are only put on for MOT tests (without cats, there would be no chance at all even entering the facility) I put the cats on ... drive ealisy to the MOT facility ... drive back home and put the PHR 3" mid and downpipe back on Quote Link to comment Share on other sites More sharing options...
Luxluc Posted August 20, 2008 Author Share Posted August 20, 2008 You would be surprised when the AFR is Stoich. If you have an aem wideband and Ecu the easiest thing to do would be to turn the o2 feedback on and set it at 14.7 on the cells which are used in the emission testing. They it should correct the fueling if setup right. But if its not on already in your map make sure you turn it off afterwards. Speak to the person who mapped it to find this? Roger that ... will try to get the car through MOT with help of a friend's relative. Will check your comment with Paul (Whiffin) after his holidays. Thanks Quote Link to comment Share on other sites More sharing options...
Luxluc Posted April 10, 2009 Author Share Posted April 10, 2009 Under the instructions of Paul (Whiffin), I modded the parameters on the AEM to lean the mixture at idle (emission tests are performed at idle in Luxemburg) ... the max limit is 0.5 % CO. Starting at 6.8 % CO with 11.7 AFR, I dropped the fuel by 12 % to get to a 0.65 % CO (AFR at 14.6). Considering that this is achieved without cats (which will be put on prior to my trip to the MOT facility), I am confident that my Supe will pass emission tests (this was the only point it failed last year) ... at least I hope so I will give feedback on the MOT pass (next friday). Cheers Luc Quote Link to comment Share on other sites More sharing options...
Luxluc Posted April 17, 2009 Author Share Posted April 17, 2009 Just passed MOT this morning. CO was 0.28 %. Thanks again Paul for the AEM adjustment coaching ... and thanks RyanG for your advice As said, I have had my original Toyota cats custom modded (by Whifbitz) to fit between the PHR turbo and the HKS exhaust ... I put some pics in attach. Without the cats, I could not get the CO under 0.65 %. Luc Quote Link to comment Share on other sites More sharing options...
bignum Posted April 17, 2009 Share Posted April 17, 2009 Nice 1, so it passed without the cats in? Quote Link to comment Share on other sites More sharing options...
Ian W Posted April 17, 2009 Share Posted April 17, 2009 Nice 1, so it passed without the cats in? Looks to me like it passed with the cats in mate Quote Link to comment Share on other sites More sharing options...
bignum Posted April 18, 2009 Share Posted April 18, 2009 Ah righto. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted April 18, 2009 Share Posted April 18, 2009 Glad you passed, 12 to 14.7 is a big difference, also in future, when you install the cats for MOT give it a bit of stick before the test, as the cats need to get pretty hot in order to work properly, which is why you where getting no difference when they where fitted, also the rich AFRs keep everything cool. Quote Link to comment Share on other sites More sharing options...
Luxluc Posted April 18, 2009 Author Share Posted April 18, 2009 Ah righto. Yes Si ... glad I can drive it road legal now The pics you see are my OEM Toyota cats which have been custom welded by Whifbitz ... I only put them on for the MOT tests. Quote Link to comment Share on other sites More sharing options...
Luxluc Posted April 18, 2009 Author Share Posted April 18, 2009 Glad you passed, 12 to 14.7 is a big difference, also in future, when you install the cats for MOT give it a bit of stick before the test, as the cats need to get pretty hot in order to work properly, which is why you where getting no difference when they where fitted, also the rich AFRs keep everything cool. I put the standard map back on (the one Paul put on when he mapped the car). I just download the "MOT-Map" in front of the facility prior to the tests (and the standard one back on at the exit ). The car runs pretty crappy at idle, therefore I don't want to drive it from my local garage to the facility as it's 20 mls away. You are right Ricky ... I needed the cats on temp (although I don't want to push the turbo at all as the cats are too restrictive and give too much back-pressure ... don't want to damage the engine). I had the car running for 30 min in front of the facility to keep the cats at the right temp(playing slighly with the revs between 1000 and 2800 rpm). Luc Quote Link to comment Share on other sites More sharing options...
Supra-Brett Posted April 18, 2009 Share Posted April 18, 2009 Yes Si ... glad I can drive it road legal now The pics you see are my OEM Toyota cats which have been custom welded by Whifbitz ... I only put them on for the MOT tests. Well not quite - its not road legal if you take the cats out straight after the MOT, and adjust the fueling again!! Quote Link to comment Share on other sites More sharing options...
Luxluc Posted April 19, 2009 Author Share Posted April 19, 2009 Well not quite - its not road legal if you take the cats out straight after the MOT, and adjust the fueling again!! Psst .. not too loud please. I agree ... but the cops don't know that the car runs without cats ... and they can't get their fat belly under the car to check Quote Link to comment Share on other sites More sharing options...
oxi83 Posted May 5, 2009 Share Posted May 5, 2009 Just failed MOT today also, damn! Seems like having the same problems as you, at least a lil' bit! AFR way to rich, that's what i knew already before (having trouble finding someone around luxembourg who is mapping the map-ecu2), CO was at 4,x and lambda with 8,x way to high (either way the o2 sensor or the cat is damaged seriously...). Glad to hear you managed MOT and got the lady back on the streets! Quote Link to comment Share on other sites More sharing options...
Matt H Posted May 5, 2009 Share Posted May 5, 2009 Nice work mate, no prob up a fiesta for you! Quote Link to comment Share on other sites More sharing options...
Luxluc Posted May 6, 2009 Author Share Posted May 6, 2009 (edited) Just failed MOT today also, damn! Seems like having the same problems as you, at least a lil' bit! AFR way to rich, that's what i knew already before (having trouble finding someone around luxembourg who is mapping the map-ecu2), CO was at 4,x and lambda with 8,x way to high (either way the o2 sensor or the cat is damaged seriously...). Glad to hear you managed MOT and got the lady back on the streets! Where did you get the car from ? Edited May 6, 2009 by Luxluc (see edit history) Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.