Ralph Cordell
10-23-2008, 11:48 AM
I am still trying to get my 87 GN on the road. A couple of years ago I installed a vacuum system after my powermaster went out. The brake pedal is pretty stiff when the engine is off but become really light (very little resistance except close to the bottom) when the engine is on. Is this normal? I have a salvage title for it and need to get it inspected before I can drive license it here in GA. My concern is that the brakes will not get passed.
They hold well when the pedal is fully depressed and stop the car fine in driveway testing and short trips down the street (car is not licensed). I checked the vaccuum at an idle and am pulling around 40psi. I replaced the old check valve with a new one (new one passed suck-blow test). I bought a vacuum pump from Summit but have not installed it yet. Given the reading - it may not be necessary.
I am thinking the vacuum booster may have gone out on me. Is there any way to test them? Also - I bought the system a couple of years ago on ebay and am trying to figure out what model/year I need to use in getting a new booster from my local parts guy.
Any help you can provide would be most helpful.
-ralph
They hold well when the pedal is fully depressed and stop the car fine in driveway testing and short trips down the street (car is not licensed). I checked the vaccuum at an idle and am pulling around 40psi. I replaced the old check valve with a new one (new one passed suck-blow test). I bought a vacuum pump from Summit but have not installed it yet. Given the reading - it may not be necessary.
I am thinking the vacuum booster may have gone out on me. Is there any way to test them? Also - I bought the system a couple of years ago on ebay and am trying to figure out what model/year I need to use in getting a new booster from my local parts guy.
Any help you can provide would be most helpful.
-ralph