Throttle body hissing after valve cover replacement!

[gkinng]

I replaced my valve cover gaskets and had the throttle body off. Installed everything back, but now I have a hissing noise while the truck is running.

There is an elbow below the throttle body and that is where the noise is coming from. When i put mu finger on it the noise goes away. I cant find any hoses that are suppose to go on there. Anyone have any input?

 

[thecole1098]

Sounds like you forgot to put the vacuum line for the PCV valve back on.

 

[gkinng]

took the air intake pipe off again and looked around. Hose on the elbow came off and fallen down. fixed now.