In examining my idle valve I came across a couple of questions. What is the
hose that comes out of the top of the idle valve? It seems to go over and
split off, one end goes to the valve cover and the other end goes to the air
filter housing. My hose does not fit well and it is cracked on the end
connected to the valve cover. Would this affect the idle valve function?
There is also some oil around the hose fitting at the valve cover. What is
this hose?

Chris Prestridge
1988 190E 2.3