Please Help!!!!!!!!! (power brake booster ??)
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Please Help!!!!!!!!!
I have a 1993 SC400 and the power brake booster started hissing and the brakes were nearly nonexistent, so I got another power brake booster from a wrecking yard and replaced it. I also replaced the air intake breather hose at the same time( I have no idea what this would have to do with anything, but I thought I would mention it just in case). When I started the car to check it out before bleeding the brakes it now runs very poorly and has a terrible dull knock. Before I replaced the booster she ran beautifully and nearly silent. Is there anything that I may have bumped under the brake pedal or around the booster\master cylinder area that could cause this? I always try to be extremely careful. There are no check lights lit up and I am afraid to run it for very long, since I have no idea what could have happened? Any suggestions would be appreciated. I am completely at a loss.
Thanks,
Cory
I have a 1993 SC400 and the power brake booster started hissing and the brakes were nearly nonexistent, so I got another power brake booster from a wrecking yard and replaced it. I also replaced the air intake breather hose at the same time( I have no idea what this would have to do with anything, but I thought I would mention it just in case). When I started the car to check it out before bleeding the brakes it now runs very poorly and has a terrible dull knock. Before I replaced the booster she ran beautifully and nearly silent. Is there anything that I may have bumped under the brake pedal or around the booster\master cylinder area that could cause this? I always try to be extremely careful. There are no check lights lit up and I am afraid to run it for very long, since I have no idea what could have happened? Any suggestions would be appreciated. I am completely at a loss.
Thanks,
Cory
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Are you talking about the line that runs from you're brake booster box to your intake manifold? Did you buy a new line or did you use one from the junk yard? Seems like you might have a vaccum leak somewhere. Is it idling rough?
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hissing would seem to signify a vac hose leak. buy some new hose and start replacing them - beginning w/the brake booster. it may also be as simple as one of the hoses that you replaced is not entirely secure.
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I'm not exactly sure? From the engine itself maybe lower? The idle seems lower and weird too? I was wondering if something vacuum or electrical couls have be knocked off? The car was perfect before I replaced the power brake booster.
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