Vacuum...

[Andylad13]

How much vacuum am I supposed to be getting? I'm pulling 10 inch lbs. When you hit the brakes it dumps to zero. Takes a couple of mins to build back up to 10. If I turn the truck off the vacuum stays at 10 for a while.

 

[Andylad13]

When vacuum pumps fail, they usually fail in the VOLUME catagory first. A reduction in presure comes later. So don't just see 20-23 inches and assume it's good. It should make that presure in just a second or 3.

found it.

 

[LCAM-01XA]

Yes, pump is probably shot.

 

[Andylad13]

Oh it's shot alright!

New re-man is pulling 25 at idle!

 

[icanfixall]

Glad you "fixed it"... Feels good doesn't it...