GT04JAP Posted March 24, 2013 Share Posted March 24, 2013 Hi all Was hoping I could get some helpful advice from the experts on this site. My 350 failed the MOT on Friday due to emissions, CO2 reading was 0.56 apparently it should be no more than 0.30. I took the car for an hour hard drive this lunchtime and took it back to motest in Aldershot (had been advised to get cats up to temp) still failed at 0.50!! Anyone know what could be causing this? I'm running berks free flow cats and a cobra stainless exhaust and a remap. It passed last year with the cobra exhaust and standard cats so only change is the berks and remap. Thanks Gary I Sent from my Nexus 7 using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
Mark@Abbey m/s Posted March 24, 2013 Share Posted March 24, 2013 Gary, have you got the emission sheet? can you scan it and post it up on here? after you drove the car t warm the cats was the car tested quickly or did you have to wait before having the emission test? Quote Link to comment Share on other sites More sharing options...
Chris AME Posted March 24, 2013 Share Posted March 24, 2013 We had a focus RS with this problem, customer held it at 2-3k until they were warmer and did the test immediately, getting the cats to a higher temperature prior to testing they are more efficient. When my berks are warm you can feel the heat from them on a cold day Quote Link to comment Share on other sites More sharing options...
GT04JAP Posted March 24, 2013 Author Share Posted March 24, 2013 Hi Mark I can scan it in the morning as I'm at the girlfriends at the moment. On Friday the car was cold which is why I was advised to get the exhaust hot, so took it for a good hour run and it went straight in on ramp. Passed all other tests on emissions was just the CO2 which was up at 0.56. Last year on my reading was 0.03. Also I had the 2 rear lambda sensors replaced back in November when engine management light came on. The MOT man reckoned the cats were shot as they smelt funny but I only had them fitted in August so doubt if they are, what do you think? Sent from my Nexus 7 using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
GT04JAP Posted March 24, 2013 Author Share Posted March 24, 2013 Atkin666 I did take it for a good blast for an hour and took it straight to test station and they shoved the pipe straight up her pipe still only got a 0.5 reading. Cheers Gaz Sent from my Nexus 7 using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted March 24, 2013 Share Posted March 24, 2013 Stick your old OEM cats back on for the test or take it to an MOT station that is not so picky. Alex. 1 Quote Link to comment Share on other sites More sharing options...
chippychip123 Posted March 24, 2013 Share Posted March 24, 2013 My berks struggled to pass, luckily I knew the tester and they ended up doing the fast idle test just at normal idle and it went through fine then lol 1 Quote Link to comment Share on other sites More sharing options...
GT04JAP Posted March 24, 2013 Author Share Posted March 24, 2013 (edited) Hopefully getting loaned a standard set tomorrow so it passes the test as I didn't keep mine as the berks were supposed to be MOT friendly. Thanks for the advice I shall update tomorrow if it passes or not, fingers crossed Gaz Sent from my Nexus 7 using Tapatalk 2 Edited March 24, 2013 by GT04JAP Quote Link to comment Share on other sites More sharing options...
RobPhoboS Posted March 24, 2013 Share Posted March 24, 2013 How is your MPG at the moment ? I wonder if something like the MAF sensor is dirty, then once cleaned perhaps it would sort out the fuel\air ratio ? (completely stabbing in the dark here - no idea if that's how it works ) Quote Link to comment Share on other sites More sharing options...
4RE Leather Posted March 24, 2013 Share Posted March 24, 2013 How strange. I don't have cats and mine flew through the emmisions! I am with Alex, go find another one! Quote Link to comment Share on other sites More sharing options...
Parsnip Posted March 25, 2013 Share Posted March 25, 2013 How strange. I don't have cats and mine flew through the emmisions! I am with Alex, go find another one! Isnt a decat a straight fail, emissions or not? Unless you get into manufacturer fitted stuff, but exery Zed made would have left Nissan with a pair of cats, no? Mine recently failed on C02 with berks and a Nismo exhaust, tried again after some enthusiastic driving, with the tester knowing that iit was going to be close and it passed. Quote Link to comment Share on other sites More sharing options...
Chris`I Posted March 25, 2013 Share Posted March 25, 2013 How strange. I don't have cats and mine flew through the emmisions! I am with Alex, go find another one! Isnt a decat a straight fail, emissions or not? Unless you get into manufacturer fitted stuff, but exery Zed made would have left Nissan with a pair of cats, no? Some testes dont exactly follow the rules. And some people therefore get smug about it The comments from the bus' first MOT were "Emissions too low to register" Quote Link to comment Share on other sites More sharing options...
4RE Leather Posted March 25, 2013 Share Posted March 25, 2013 Not smug. The emmision test without cats was well within the limit so I was surprised that your car with Cats failed. I had hoped the chosen ones could read between the lines. Hope ya bus gets kangaroo fuel and ya bum gets swollen as a result:) Quote Link to comment Share on other sites More sharing options...
4RE Leather Posted March 25, 2013 Share Posted March 25, 2013 How strange. I don't have cats and mine flew through the emmisions! I am with Alex, go find another one! Isnt a decat a straight fail, emissions or not? Unless you get into manufacturer fitted stuff, but exery Zed made would have left Nissan with a pair of cats, no? Mine recently failed on C02 with berks and a Nismo exhaust, tried again after some enthusiastic driving, with the tester knowing that iit was going to be close and it passed. Yes it is a fail but we wanted to test it b4 the cats were put back on. Emmision test was better with them off! Quote Link to comment Share on other sites More sharing options...
Chris`I Posted March 25, 2013 Share Posted March 25, 2013 Hope ya bus gets kangaroo fuel and ya bum gets swollen as a result:) Kangaroo fuel - where can I get that from, sounds like fun Quote Link to comment Share on other sites More sharing options...
4RE Leather Posted March 25, 2013 Share Posted March 25, 2013 Hope ya bus gets kangaroo fuel and ya bum gets swollen as a result:) Kangaroo fuel - where can I get that from, sounds like fun BBK of course:) Quote Link to comment Share on other sites More sharing options...
The Bounty Bar Kid Posted March 25, 2013 Share Posted March 25, 2013 You called? Quote Link to comment Share on other sites More sharing options...
4RE Leather Posted March 25, 2013 Share Posted March 25, 2013 You called? Lol as if by magic he appeared:) Quote Link to comment Share on other sites More sharing options...
GT04JAP Posted March 25, 2013 Author Share Posted March 25, 2013 (edited) Well spent all day with Jez at HDev replacing my cats with standard and a standard Y piece and it still failed the emissions, no change in reading what so ever!! I reckon the testers O2 sensor may be buggered but he reckoned it could be due to the car not recognising the new Lambda settings when they were fitted so back up to HDev for Jez to test but all seemed fine on his computer. Am totally at a loss now as something weird is going on. It is booked in at Fleet Auto way which is a Nissan approved independent on Thursday to see what they can come up with unless someone can give me directions to a very relaxed MOT tester ;-) Sent from my Nexus 7 using Tapatalk 2 Edited March 25, 2013 by GT04JAP Quote Link to comment Share on other sites More sharing options...
rtbiscuit Posted March 25, 2013 Share Posted March 25, 2013 Might sound odd, but find a terra-clean dealer, and get them to run a treatment on it. Quote Link to comment Share on other sites More sharing options...
4RE Leather Posted March 25, 2013 Share Posted March 25, 2013 Stick some redex in! Quote Link to comment Share on other sites More sharing options...
Chris`I Posted March 26, 2013 Share Posted March 26, 2013 Might sound odd, but find a terra-clean dealer, and get them to run a treatment on it. I've heard good things about this - more than just snake oil like mos of the products out there Quote Link to comment Share on other sites More sharing options...
AliveBoy Posted March 26, 2013 Share Posted March 26, 2013 Well spent all day with Jez at HDev replacing my cats with standard and a standard Y piece and it still failed the emissions, no change in reading what so ever!! I reckon the testers O2 sensor may be buggered but he reckoned it could be due to the car not recognising the new Lambda settings when they were fitted so back up to HDev for Jez to test but all seemed fine on his computer. Am totally at a loss now as something weird is going on. It is booked in at Fleet Auto way which is a Nissan approved independent on Thursday to see what they can come up with unless someone can give me directions to a very relaxed MOT tester ;-) Sent from my Nexus 7 using Tapatalk 2 Let me know if you need a friendly MOT tester. I know of 2, one in ash and one in Guildford. 1 Quote Link to comment Share on other sites More sharing options...
Mark@Abbey m/s Posted March 26, 2013 Share Posted March 26, 2013 Well spent all day with Jez at HDev replacing my cats with standard and a standard Y piece and it still failed the emissions, no change in reading what so ever!! I reckon the testers O2 sensor may be buggered but he reckoned it could be due to the car not recognising the new Lambda settings when they were fitted so back up to HDev for Jez to test but all seemed fine on his computer. Am totally at a loss now as something weird is going on. It is booked in at Fleet Auto way which is a Nissan approved independent on Thursday to see what they can come up with unless someone can give me directions to a very relaxed MOT tester ;-) Sent from my Nexus 7 using Tapatalk 2 Did Jez reload a stock MAP into the ECU prior to trying the car again on the MOT emission test? I very much doubt the MOT emission test machine will be out of calibration. The rear lambda's don't need syncing to the ECU, just bolt them in and they are all okay normally. Quote Link to comment Share on other sites More sharing options...
The Chubby Ninja Posted March 26, 2013 Share Posted March 26, 2013 I got a cat fitted to my evo for an MOT and it failed. I was told to run some fuel/injector cleaner through it and it would bring it down. I opted for ripping the cat back off and finding a friendly MOT station so dont know if the fuel cleaner will work for sure 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.