So I bought a 95 chevy blazer v6 4,2L and was told prior to buying it that the brake booster was out. Okay that‘s no problem I say Well after driving it and realizing that pushing that pedal was a task in itself, I need to be 100% percent sure it‘s the booster. I get a hiss when I apply any pressure to the pedal, breaks work(after wrestling down the pedal), and yes my engine bogs when I press it in idle. Hissing continues while brakes applied. So who out there can tell me yes, that‘s your issue? Thanks
My money is on the booster but try a check valve and also have someone push the brake pedal whily you listen underhood and dash for the hiss Salvage yard should have one for short money.
come across a distinctive keep despite else you return to a call to do. the keep that replaced your brake line charged you way too lots and curiously that they might have brought about harm on your brake booster. it is not primary for it to make a hissing sound.
sounds like it as booster is the vacuum that boosts the pressure you apply to pedal to more pressure in the brake system for more brake power it uses engine vacuum for pressure so if you have a leak it will pull more engine pressure to try and help the leak is the hissing sound your hearing, replace brake booster is all you can do, this is very hard and time consuming for diyers and pros as the placement of booster makes it hard to get to and get off pros will be able to do it easier than you, unless you have a whole shop at your disposal i would save headache and take it somewhere
