madspikes 41 1 Cars Posted October 1, 2007 (edited) I've just had the 205 MOT tested and it failed on emissions. I've just been looking at the emission report and it looks like they've tested it as a closed system and not as an open loop system. What limits should my 205 go under? Its a 1992 NON cat 1.9 gti. I think they may have got confused as it now has a wideband lambda sensor running a MS. Could some one look at the report and confirm what I'm saying before I kick some ASS! See attached: Thanks Mad. Edited October 1, 2007 by madspikes Share this post Link to post Share on other sites
jim21070 2 Posted October 1, 2007 Sorry Mad, It's not a happy bunny even if you take the higher non-cat limits. For natural Idle the CO has to be less than 3.5%. Yours is 4.52% and this is a fail even for much older cars that are allowed 4.5% For Non-Cat, the fast Idle is a pass but because they tested it closed-loop it failed on lambda. Is you WB lambda actually making your MS work closed-loop or do you have it simply to read AFR? Until you get the Natural Idle CO below 3.5% it won't pass, open or closed-loop. My guess is you're running rich at idle. Looks like a re-map is going to be needed. Has it passed an MOT previously on your current set-up? On the bright side, the HC readings are excellent! Share this post Link to post Share on other sites
GTI6BOY 29 Posted October 1, 2007 (edited) beat me to it Edited October 1, 2007 by GTI6BOY Share this post Link to post Share on other sites
madspikes 41 1 Cars Posted October 1, 2007 Humm... The car NEVER idles below 1100rpm normally... So not sure how they got a measurment at that rpm! This is the first time the car has been tested on this setup. The car isnt running closed loop at the moment. Yea, ok the maps a little lumpy! The car is booked in for a re-test and they have agreed for me to take the laptop along for a tweek as we go session, as long as it doesnt take more than an hour. Well, thanks guys. I must point out to the them next time its not a closed loop system... Mad Share this post Link to post Share on other sites
Miles 331 1 Cars Posted October 1, 2007 They did get confused as it's listed as a DFZ engine which is the 105bhp low comp engine found in CTi's and Gentry's, But they should have tested it correctly even thou it still would have failed but with a older car you can use a higher tickover which I know the testers don;t like, But hey it's ATS!! Share this post Link to post Share on other sites
jim21070 2 Posted October 1, 2007 The car is booked in for a re-test and they have agreed for me to take the laptop along for a tweek as we go session, as long as it doesnt take more than an hour. That's good of him, should be easy enough to tweak it for a pass then Share this post Link to post Share on other sites
Sandy 191 Posted October 1, 2007 Try a bit more advance at idle. Share this post Link to post Share on other sites
madspikes 41 1 Cars Posted October 1, 2007 I have been taking my cars there for years, they are very good and have never had any problems with them. They always seem to be fair, and are really good about retests. The car failed, no matter if they did the correct test or not, so I cant really get upset. The question is, can I use my the analysiser to aid in the tuning of my map. I have a wideband on the car, but for the MOT is was running abit rich... scare to go too lean, but I think I went too much the wrong way! Thanks for all the replys. mad Share this post Link to post Share on other sites
Sandy 191 Posted October 2, 2007 A bit rich at idle often gives the best compliance I've found, but there's no substitute for having it on the testing machine for getting what you need. Share this post Link to post Share on other sites
