Logo
FULL SITE MENU

1991 454CIDwhere to connect for vacuum test

S

slauder

Regular Contributor
"Needing to get more informati

"Needing to get more information about engine...
Looking to take vacuum readings from intake manifold.

Where do I connect? I dont see anything but the carberator vacuum fitting. Am I missing something or is that correct?

Thanks,
Scott"
 
There may be a pipe plug betwe

There may be a pipe plug between the carb and the distributor. Some of the 'older' q-jet throttle plates have a capped off hose barb that is exposed to manifold vacuum. The last 'easy' spot is to tap off the vacuum hose feeding the vacuum break. I usually pull the hose and insert a T fitting into it. another length of hose ties the T back to the vacuum source and the gauge connects to the third leg of the T.
 
Back
Top