B
bstedman
Guest
I have read every brake post in the forum and tried all the suggestions. But, I still have a brake problem.
I have replaced the master cylinder and power booster (rebuilts), the rubber brake lines, brake fluid, calipers (now o-ringed VBPs), and bled the brakes so many times I can do it blind folded. There are no visible signs of brake fluid leaking.
I also bought the Motive Products power bleeder and bled the brakes with zero air coming out at the caliper bleed screws.
The only items that have not been replaced are the metal brake lines and the proportioning valve.
The brake pedal is solid as a rock with the engine off. With the engine running, when the brake pedal is depressed, it goes almost to the floor, dash brake light comes on, and there is a hissing noise from underneath the dash.
I suspect it is the master cylinder or power booster but would like some confirmation prior to taking it all apart again.
I have replaced the master cylinder and power booster (rebuilts), the rubber brake lines, brake fluid, calipers (now o-ringed VBPs), and bled the brakes so many times I can do it blind folded. There are no visible signs of brake fluid leaking.
I also bought the Motive Products power bleeder and bled the brakes with zero air coming out at the caliper bleed screws.
The only items that have not been replaced are the metal brake lines and the proportioning valve.
The brake pedal is solid as a rock with the engine off. With the engine running, when the brake pedal is depressed, it goes almost to the floor, dash brake light comes on, and there is a hissing noise from underneath the dash.
I suspect it is the master cylinder or power booster but would like some confirmation prior to taking it all apart again.