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Hi , just thinking of test my mex but its been off road a couple of years for a bit of a rebuild , in this time ive fitted some 45's and just set them up by ear , will it fail on the co2 reading ? have been told that because its old it dont get checked for co2 , is this true ? it a 1978 one , thanks mick
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they do check the CO2 but it has a way bigger allowance than a newer car
the place that did my old one, pracitally held the pipe near the exhaust LOL -
Thanks ,i hope ok !Comment
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You probably mean CO reading as that is an indication of how rich the mixture is. The CO2 reading is used to give an indication of leaks in the exhaust system. For older cars the CO reading can be as high as 4,5% or even 6,0%.Comment
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Should read less than 6% for our cars ,mine was 9% but garage couldnt work out how to adjust so passed it
CheeRS Neil
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4% before 86 after 3.5% good luck
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10% here
Mine just get's a "Visual" check 
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The place that I go to for the past two years haven't been able to read my CO, just comes out as 0% and thats with the pipe thing up my exhaust.
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they need a new machine or your car needs setting up!
Too old of a cat 🐱 to be f--ked by a kitten
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hope it's mot running too lean or else............Originally posted by hotrs2000 View PostThe place that I go to for the past two years haven't been able to read my CO, just comes out as 0% and thats with the pipe thing up my exhaust.Comment
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Dont forget the HC's (Hydrocabons) !
Value allowed is 1200
Slight misfires, worn carbs, incorrectly set-up carbs etc etc
will all effect HC readingscheeRS
DAVE
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ohh guess who is the new mot tester.........
Too old of a cat 🐱 to be f--ked by a kitten
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ya should be ok as long as its not smokin like a good un !!!!!!!
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There's going to be a big Q outside someones garage...me think all old RS's on carbs as well
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