3 replies to this topic

[mm man]

Hi as above I have got gunson digital gas tester what figure should I be looking for to set my mixture on a 1987 mg metro 1275 A+ leaded motor never used this machine before .
Or can anyone tell me / link me to where I can get the figures
Thanks

[Wise Old Elf]

I used mine the other day on our 1275.

 

I set the CO at 3%, It does go up and down but settles around 3 and runs and idles well. Passed MOT no problem.

 

Remember to adjust the machine to zero first before poking up the exhaust.

[Wise Old Elf]

From http://www.car-emiss...-emissions.html

 

 

 

"Carbon Monoxide Emissions

For vehicles registered between 1st August 1975 and 31st July 1986, the CO level must not exceed 4.5% by volume.

For vehicles registered between 1st August 1986 and 31st July 1992, the CO level must not exceed 3.5% by volume.

Vehicles registered after 1st August 1992 must conform to the manufacturers specification (the MOT testing garage usually checks these values on a database). The carbon monoxide level is tested at two speeds; “idle” and “fast idle”. Although the specification varies between car models, the guidelines are generally 0.5% at idle and 0.3% at fast idle."

[mm man]

Wow that was quick thanks very much