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Did the tester test the emissions at idle, or did he, as he is permitted to with twin SU carbs, test it again at circa 2000 RPM?
The carbs were tested on idle.
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What you need is a Classic car place that understand the S.U. carb set-up. It is very much like the M.G. Midget. There must be others nearer to you but as an example there is Beech Hill garage , Beech Hill south of Reading that are well versed in M.G's. And the Dolomites have very similar S.U. set-ups. And I would recommend them. Tell them that you need it set up for an MOT test.
With High CO and High HC there may be something else wrong but typically adjusting the S.U. jet adjuster nuts up by about 4 flats should be quite close to achieving a pass on CO. From my experience if there is high H.C. as well that usually means burning oil
or a mis-fire on one or more cylinders. It may clear up when the CO is closer to 4.5% though.
I find a Colourtune and Gunson air flow meter quite useful for setting these up.
Tony.
Thanks, I will keep an eye out for mechanics who know their mg's aswel then
Trying to find someone fairly local, with not having an MOT I'm really limited to where I can't take the car.
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Get your air filters fitted before having the carbs set up otherwise you'll end up having to do it twice. The fuel/air mixture will be richer with dirty air filters because there's less air coming in to the carbs. New air filters let more air through.
The air filters arrived yesterday so will be fitting those before I get the carbs looked at.