Brake booster going out?
Hey all, just wanted to make sure I'm on the right track before I buy any parts. Car is a 72 Duster, 318 3-speed manual with front Kelsey-Hayes disks and rear drums.
The issue: power brakes are pretty much gone. Ton of pedal pressure to get the car to stop. Replaced the vacuum hose to the intake cause it was pretty old. Issue persisted. Checked vacuum at engine and its 19-20in at idle so plenty. When I press the brake in I can hear it hissing and releasing pressure. It also doesn't seem to return the pedal as high as it used to. If I park in my slanted driveway the brake lights will usually stay on because Im holding the brake when I turn the car off. The car immediately loses brake pressure when it turns off. It will immediately roll back the instant it loses vacuum.
The engine speed also increases significantly when the brake is pressed. Probably 3-400 RPM. Dont have a tach so dont know exactly though
Is there anything else I should check before I order up a new booster? It's pretty rusty, the rear rod cover is shredded and it already has a remanufacutred sticker on it so not worth rebuilding again. Has anyone used the right stuff 8" booster from Jegs or anywhere? Thanks in advance.
Hey all, just wanted to make sure I'm on the right track before I buy any parts. Car is a 72 Duster, 318 3-speed manual with front Kelsey-Hayes disks and rear drums.
The issue: power brakes are pretty much gone. Ton of pedal pressure to get the car to stop. Replaced the vacuum hose to the intake cause it was pretty old. Issue persisted. Checked vacuum at engine and its 19-20in at idle so plenty. When I press the brake in I can hear it hissing and releasing pressure. It also doesn't seem to return the pedal as high as it used to. If I park in my slanted driveway the brake lights will usually stay on because Im holding the brake when I turn the car off. The car immediately loses brake pressure when it turns off. It will immediately roll back the instant it loses vacuum.
The engine speed also increases significantly when the brake is pressed. Probably 3-400 RPM. Dont have a tach so dont know exactly though
Is there anything else I should check before I order up a new booster? It's pretty rusty, the rear rod cover is shredded and it already has a remanufacutred sticker on it so not worth rebuilding again. Has anyone used the right stuff 8" booster from Jegs or anywhere? Thanks in advance.
