Why is my PCV valve hissing?

Question

I have a 2001 ford escort and was trying to change the pcv valve. i bought the part from the dealership but it only came with the valve not the elbow. When I installed the new piece I reused the elbow and hose. Now there is a variant hissing noise, coming thought the elbow. what is this, how bad is it?

Answer 1

its probably got small crack in it causing this too happen,check it and se if it does,you can buy this part from a parts store,ad that will probably solve the problem with it,good luck.

Answer 2

You have a vacuum leak.  The good news- you know where it is.  The bad news- it can affect the performance of your car, especially at idle.  If it doesn't look like the original, take it back- they may have given you the wrong part.  Take the old one with you, so it can be matched up.

Answer 3

check the elbow for holes, sometimes new PCV valves hiss like that. it did on our chevy blazer