I have a 1971 merdeceds 280 S, when I drive it and stop at a light it stalls and is very hard to restart. I think the hose from the valve cover to the air cleaner is blowing to much smoke in the moisture seperator. If I remove the hose it seems to idole better and the replace the hose and it wants to stall, I have checked the hose and it is not pluged, not sure what to do please help...