Sandyloveskebab Posted February 20, 2017 Report Share Posted February 20, 2017 Had the lupo in for its mot and the only thing I don't know how to sort is how to lower the co output. The limit it said is .3 and I was .6 and .57 both times Ive had a new cat in the last 6months and changed the oil recently. What next should I try? Should I change the spark plugs and air filter or would additives make a bigger difference? As usual all help is appreciated Quote Link to comment Share on other sites More sharing options...
Rich Posted February 20, 2017 Report Share Posted February 20, 2017 a cheap new cat stops working pretty quick, good service, new lambda and if pushed google water injection to clean the engine. Quote Link to comment Share on other sites More sharing options...
Sandyloveskebab Posted February 20, 2017 Author Report Share Posted February 20, 2017 thanks Rich, i was looking online and apparently high Co output is related to not having enough air for the fuel mixture so ill have a look at changing the filter first and get an additive like redex or cataclean however the engine has been swaped in the past and the current one doesnt have a plug for the egr valve so i really hope that with changing the filter and adding something to the fuel will fix it because otherwise ill be out of luck haha Quote Link to comment Share on other sites More sharing options...
Mobieus_uk Posted February 20, 2017 Report Share Posted February 20, 2017 maybe a good old thrash is whats needed, get engine nice and hot burn off all the crap Quote Link to comment Share on other sites More sharing options...
Sandyloveskebab Posted February 20, 2017 Author Report Share Posted February 20, 2017 Thats probably another part to it since its not been used much the last couple weeks. Is that something that's legal now given its failed an mot? It still had a month left untill its up first time ive had to do it though so I don't know if thats invalid now? Quote Link to comment Share on other sites More sharing options...
Mobieus_uk Posted February 21, 2017 Report Share Posted February 21, 2017 if you still have a current MOT its still valid, they changed the rules a few years ago and said that a failure would cancel out any MOT left, they changed it back again https://www.gov.uk/getting-an-mot/after-the-test Quote Link to comment Share on other sites More sharing options...
Skezza Posted February 21, 2017 Report Share Posted February 21, 2017 I recently fixed a car with both carbon monoxide and lambda failures on the MOT. The tester told me it needed a new cat and almost no cars fail both unless the cat is ****ed. I decided I knew better. 20 minutes at 75mph in 3rd gear later...... MOT passed. Quote Link to comment Share on other sites More sharing options...
Sandyloveskebab Posted March 9, 2017 Author Report Share Posted March 9, 2017 Just to update his guys changed the spark plugs air filter and put redex in the fuel and that managed to get me through plus the car is easily a good 20-30%more efficient on fuel now happy days Quote Link to comment Share on other sites More sharing options...
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