well , i've been trying to figure out why my car is running rich , and after endless sensor swaps and checking all things that can make my engine run rich , i decided to re-do my intake manifold gaskets , and today whan i was cleaning the mating surfaces on the heads , and i moved the brake booster line and i noticec that the valve stem on the black cylinder valve looking thing was broken , could this create a vaccum leak big eneough to throw off my map sensor ? whats the name of the part ?





sorry for posting pics like this , i dont know how to attach images

 

Yep. Broken or cracked vacuum port = vacuum leak.
It's the check valve for the brake booster.
http://home.wanadoo.nl/xavira/brakepower/power.htm

 

thanks ! , i did my research and the correct name for it is " power brake filter " at least i was told , i picked up a new one today and while i was at it i picked up some goodyear vaccume hose "im going to replace every inch of stock vaccum hose i can find " just to be on the safe sid e, heh the part goes for 40 bones through AC delco , yet Doorman makes the same one and it goes for $6.99 .