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Old 17 Jul 2008, 06:31 pm
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Default Brake booster question for 1994 Honda lx?

Ok heres the deal, please bear with me. I took my car around to my friends house because the brake lights wouldnt turn off. He rummaged around under the dash and told me I was missing the Brake pedal stop pad (little rubber thingy that hits the brake switch). No problem I thought, only costs about $5.However, as I was driving away from my friends house I heard a hissing noise from under the dash and the brake pedal was very firm (I had to use all my weight to stop the car). I took it the the mechanic and he said I needed a new Brake booster, total cost $575!My question is this, did my friend dislodge something under the dash when he was looking down there to cause this problem? thanksPs, im not going to blame my friend I just would like to know if I can fix it on my own!
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Old 17 Jul 2008, 06:46 pm
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Join Date: Aug 2007
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no, your friend did not dislodge anything that would cause the brake booster to fail. the brake pedal rod at the top of the brake pedal presses into the back of the brake booster but unless he or she disconnected the rod from the brake pedal there is nothing he or she could have possibly done to damage the booster.the brake booster works off of engine vacuum. if any vacuum lines are off, particularly the one to the booster it would cause this problem. that would be a vacuum problem and not a booster problem. do you still hear the hissing noise? A hissing noise is an indication of air leaking. when air leaks into a vacuum its called a vacuum leak. so if you still hear the hissing then you want to follow your ear to see where it's coming from and fix it. in all likelyhood, if you were to find a vacuum leak and fix it you will fix your brake problem and you would not have to replace the booster. I don't know what vacuum lines are under the dash but I imagine your friend could have broken one. I'd start looking for broken vacuum lines under the dash!if you only hear the hiss when you press down on the brakes then there is a chance that the diaphram inside the breke booster has ruptured. that is unlikely but if you hear the noise from inside the booster then it will have to be replaced. as a note, if the mechanic didn't tell you where the booster is, its that big yellow/bronze cylinder directly to the left of the steering wheel in the back of the engine compartment.before you commit to $575 get a second opinion. you can get a replacement booster from a salvage yard for a fraction of the price and have it installed and probably get the whole thing done with salvage parts for under $150. the booster really is only a big can with a diaphram in the middle and a rod attached to the diaphram that goes to the brake pedal. not too much to go wrong with them, so a used part would in all likelyhood be good for the rest of the cars life.hope that helps
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