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The brake pedal becomes hard to push in order to stop the vehicle and when the brake is applied you may also hear a vacuum leak and the engine rpm at idle changes.
It is the same thing as the power steering pump - front of engine, left (driver's) side, driven by a single belt. It provides hydraulic pressure for the power steering, and for the power brake booster. Some Eldorados have had the hydraulic booster changed out and replaced with a vacuum booster; this is not factory setup.
reach under dash and remove the pin that pushes on rod then unbolt master cylinder and unbolt all 6 bolts on booster somefrom in front of fire wall some behind that you can getfrom under dash
show me vacuum diagram on 1976 malibu
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biasing check valves can reduce pressure during pedal-induced rear caliper bleeds. vacuum bleeding gives much better results.
DOT ( 3 ) brake fluid
Check out this site, http://www.nadaguides.com/
Brake fluid reservoir is located on the firewall next to the steering column. Remove cover top of master cylinder to add brake fluid.
I ordered a Haynes manual, however it doesn't show one for my 1978 Luv. Although I'm also looking for the same thing, I figured a heads up would help.
1 spark plugs worn , fouled or not gapped properly. 2 fuel filter clogged. 3 spark plug wires faulty. 4 low or uneven cylinder compression presures. 5 vacuum leaks at the thottle body , intake manifold or vacuum hoses .
It's about 16 gallons