Car is 3.8 and still has original Kelsey Haynes brake booster.
Brakes are ok on first application but after that ???
No leaks found in plumbing, so I have narrowed in on the check valve on the top of the reserve tank.
Problem is I have 2 check valves that look in good condition - so how do you check that a check valve is working ?
Wisdom says that suck and blow should prove everything is working as it is only a one way valve. Is this correct ?