20-05-2019, 04:39 PM
Graham,
For vehicles first used before 1st August 1975, there are no emission requirements. Provided that there is no dense blue or clearly discernible black smoke coming from the exhaust pipe, it will pass an MOT.
Seven's like to run a bit rich. If I get mine to run with a nice blue flame using the Colortune, it has flat spots all over the place. I would have thought that a CO content of 2.7 to 2.8% is good. For cars made between 1975 and 1986, the maximum permissible CO limit is 4.5%.
For vehicles first used before 1st August 1975, there are no emission requirements. Provided that there is no dense blue or clearly discernible black smoke coming from the exhaust pipe, it will pass an MOT.
Seven's like to run a bit rich. If I get mine to run with a nice blue flame using the Colortune, it has flat spots all over the place. I would have thought that a CO content of 2.7 to 2.8% is good. For cars made between 1975 and 1986, the maximum permissible CO limit is 4.5%.