Can anyone point me to a diagram of the vacuum system on the 5.4 2 valve engine? I've got a vacuum leak somewhere and can't find it. I'm missing a connection somewhere and I want to check them off as I go over each one.

Thanks

 

Have you checked the PCV elbow?

 

The factory put a vacuum diagram under the hood. Is it still there?

 

Read this caption:

 

Yea...I feel stupid now :o

 

All the connections/hoses look okay. So I bought a gauge to check the pressure and I'm having a hard time identifying where to hook up to the intake manifold. This engine looks so different than other cars I've worked on so teach me oh knowledgeable ones. Can anyone one provide a picture of where to hook up the gauge? Thanks

Nevermind...figured it out myself. Vacuum pressure is normal.

 

are you getting codes 171 and 174?