ls400geek

It's lower than I'd like with about an inch from the carpet when depressed while running.

We put in new brake pads, and we flushed out / replaced the brake fluid (it had dark green dirty old fluid) -- very carefully bleeding them out as to not introduce any air and get rid of any potential air that already in the system.

It's a 1998 LS400 with 180,000 miles.

I've ruled out fluid leaks, air in the brake system, old fluid.

Which should I check next? Piston Seals, Master Cylinder or Booster Push Rod? What is most likely the problem? i.e. a car this age and with its mileage.

PureDrifter

iTrader: (10)

if the pedal is lower than it was before you did all the work, there's probably air in the system.

ls400geek

It's not any lower--it's just about the same. It might be a hair higher (like 3/16")

I bought the car with a low pedal and figured changing the pads (they were low) and brake fluid might help--but it really didn't help much at all.

Btw, I have a 1998 LS400 and I could not find anywhere the proper brake bleed order so I used the order used for the older LS400's: Driver side rear, passenger side rear, passenger side front, driver side front (hope this was correct).

Yamae

You'd better to bleed the ABS brake actuator unit below in a situation like you are experiencing.

ls400geek

Yamae, thanks so much for the reply! I can't wait to try bleeding the Brake Actuator.

Looking at my factory repair manual (page BR-5), it says I need two SST (special service tool) to do this task properly: 09992-00242 and 09992-00350 (Turbocharger Pressure Guage and Brake Reservior Pressure Adapter respectively.)

I've never acquired an SST before and have no clue where to even buy one, or rent one if possible.

Anyone have any ideas? What would be the best solution for me?

Lavrishevo

iTrader: (1)

I would head to the dealer on that one.

steve2006

Get yourself a brake fluid pressure bleeder kit and save money.
Fit the pressure bleeder to your master cylinder reservoir,pressurize the system by following the instructions with the kit and then open the ABS bleed valve the fluid will be forced in and the air out.
Or get a spare reservoir cap fit an airline port and connect some compressed out to it like below.


http://www.ebay.com/itm/Branick-Indu...16e803&vxp=mtr