98 LS400 Brake Problems HELP!!!
#1
Pole Position
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98 LS400 Brake Problems HELP!!!
I just bought a 98 LS400 with 120k. The car is in excellent condition but there's something wrong with the brake system. When I press the brake paddle it goes half way in and becomes hard like a rock and the car won't stop. The previous owner gave me a paper from her mechanic that said that the car needs Brake master cylinder and brake booster, how often does the master cylinder and brake booster goes out on these cars. I've owned LS400 with 200k but never had master cylinder and brake booster issues.
#3
Driver School Candidate
POSSIBILITY your rear seal in the M.C. COULD have a leak that's pooling in the brake booster. Causing the rubber diaphargm to deteroiate, in the brake booster. Not allowing the brake booster to be an assistance. Does the brake pedal travel to the floor when applied?
#5
Driver School Candidate
ABS LIGHTS? How did the car drive before? or Has the car like that? This could be a tough call. Maybe a brake push rod is binding up, not allowing the brake piston to be fully engaged. If your handy with some tools and a shop manual, get in there a take a look. Brakes is something you don't want to take lightly.
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#10
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So which one was bad the booster or master ? Or just the gasket connecting the 2 parts was leaking . I guess I need to see an expanded view to conceptualize this fix .
#11
Sorry to bump this guys but i think im suffering from a similar issue. My pedals stiffens up with every pump i do with the car off, but the pedal does drop down where the car starts on with my foot on it. When the car is started up from a cold start, the rpm stays high at like 1.3k which is normal .. it drops down to 1.1k ish ..only to go back up to 1.3k and stays there unless i drop the car into gear... so im guessing its a vacuum leak from the brake booster? When im at a red light, the car makes a surging "vrrr" noise , guessing its a bad brake booster? thx guys.
#12
check this out
http://home.student.utwente.nl/gombe...us/lsrm/Brake/
for brake master cylinder inspection try this
http://home.student.utwente.nl/gombe...rake/br-18.pdf
http://home.student.utwente.nl/gombe...us/lsrm/Brake/
for brake master cylinder inspection try this
http://home.student.utwente.nl/gombe...rake/br-18.pdf
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