himy rs is overfueling major i have took it to a garage they put it on the co and turned it right down but its still overfeuling does any one know what could be at fault thax.

 

My car had an overfuelling problem and we couldn't adjust it enough on the mixture screw without the car cutting out.

turned out the metering head was knackered and was overfuelling one cylinder.

remove your spark plugs and inspect them in the first instance.

 

the spark plugs are black put a new set in and within a day they were black again

 

All of them black?

 

Sticky metreing head, check for carbon around the seat also.
tabetha