Is it possible to rebuild the vacuum pump in the 6.9 and 7.3 IDI, I am having a heck of a problem with my brakes on my truck and have tracked it down to a vacuum problem, when at idle, I have no vacuum at the brake booster and when I first start driving, it is complete manual brakes which is not fun with a 7,000lb trailer behind you!

 

Disregard, found the problem, it was a bad check valve at the brake booster.

 

Are your trailer brakes working correctly?

 

Yes, they are electric trailer brakes