What would I have to do to my brake system to go from a power brake with disc that I have now installed on car too a manual brakes without the booster? I need to replace my power booster again, this would make a third one in 4 years. It doesn't hold vacuum.
Manual master cylinder has a smaller bore than the power masters. You would also need the correct length pushrod that goes from the pedal to the master. Also the pushrod get connected to the upper hole on the pedal.
Suggest a gym membership to work on those leg muscles!
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
I was talking to a friend about the booster issue, he asked if I had installed the filter on the vacuum line to keep gas fumes out. I had not installed it, just the vacuum line only and the chek valve. I guess that would be why my 79TA had a filter on the booster vacuum line? To keep fumes out.
He claims the fumes will ruin the diapham inside the booster? is this true?
1) The vacuum is pulling from the booster to the engine most of the time and 2) there is a check valve to prevent accidental reverse flow.
I don't see how fuel vapor could get to the brake booster.
Maybe your check valve is bad?
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
Ragu your buddy is correct. I can't find documentation but if memory serves GM had a big retrofit/recall/tech bulletin type of thing going on in the early/mid-70's where these little filters were added to many cars not originally equipped, and they came factory equipped from mid-70's all the way thru much of the 90's or until fuel injection took over. I believe maintenance requirement in the bulletin stated the filter should be changed annually. They actually are not so much a filter, but a little charcoal canister, and they are supposed to be installed vertical to work properly and absorb stray fumes. Not so much a problem when engine is running and sucking everything inward, but when vehicle is parked and carb just sits there evaporating fumes some will travel up the vacuum line and seep into the booster, supposedly shortening its lifespan and/or MAYBE an emissions/EPA thing that started with the smog era. These were never on our FGF's but could easily be added if you really feel the need. I do not, but seeing that you're suffering multiple failures it may not be a bad idea...
I tested it today with a new check valve and added the filter and reconnected the vacuum up to the booster after the engine was warmed up, the engine ran rough like it was gonna stall, then did stall. It sounds like a bad booster? I disconnected the vac line from the booster and heard no hissing sound.
