missing link ?

[GOTNOS]

Just started the car up. The car is running rich( running new o2 sensor but not plugs). But the missing link is making vaccum sound from the hole in it, is it suppose to do that? Because if you block it it shuts the car off. When I rev'd the motor it also back fired. Any idea's anyone? Also I have read about missing link having a filter. Not sure if mine has one I bought it used.

 

[selmerguy]

yeah they have a filter and it also acts as a restricter for the amount of air that comes in. it looks like a pencil eraser but made out of filter stuff. don't know where to get more.