http://soarercentral.com/sc-forum/me...39/166885.html

search "aristo nitrogen" or "soarer nitrogen" on google and you will get plenty of results.

 

I see.. Good **** ElitistK!

Cliffs:

So removing the can is no Problem, just get the correct tool and follow procedures
but is recommended to take it to a shop to unscrew it

then just bring it to a bike Shop that can refill the nitrogen

 

so guys, when you hear that annoying as hell buzz, that means that the nitrogen can be empty or almost empty? Or only when you experience brake failure the nitrogen is out?
which one?

 

like said earlier, it is completely normal for the system to buzz.

if you are not losing any brake fluid, it's a $20 gamble that i recommend to take even if you are completely clueless about what's wrong with your bmc.

 

Kosi.. Im not to sure of the effects of a lower nitrogen can, but it wouldnt hurt to remove and refill on a 10 year old system, im sure in 02 and up it may not be necessary. i also dont know if this can is a Maintenance item, which would mean as part of car maintenance program at the dealer it would get charged. 100k, 150k 200k etc..

Before you go and do it i would try to get as much info and live data./results. you dont want to mess up your unit.

It would be nice if some one on the forums was a lexus Tech/mech that has first hand experience with these cars to chime in, till then

 

yeah you're right I dont want to have anyone (like my mechnanic) to try doing some stuff they probably have little to no experience doing.

and I damn sure dont want the pleasant burden of knowing I messed it up. However I will definitley do some more research and look into it.

Another quick question. Does the brake booster on the newer 01-05 also do the buzz?

 

All BMC for the 2nd gen GS make a noise when the unit pressurizes, however its a healthy pressurizing sound that comes directly from the unit in the bay, audible only at low speed to a stop, and at start up.
Once it starts to Hum, pitch or squeal..there is some thing wrong.

the best way i can describe a healthy sound is , if you ever heard a fuel pump pressurize, like a walbro..its close to that sound

 

here is another interesting find about the YawRate sensor which is $148 from sewell, but only seems to apply to 98 models.

Lexus GS400 Recalls (Recent)
Suspension & Steering: SUSPENSION:AUTOMATIC STABILITY CONTROL (ASC)
Campaign Number: 98V080000
Dates Manufactured: 05/1997 to 02/1998
Number of Vehicles Affected: 14,855
Model Years Affected: 1998
Date Owner Notified: 06/1998

Defect Summary: VEHICLE DESCRIPTION: PASSENGER VEHICLES. DUE TO A MANUFACTURING DEFECT OF THE YAW RATE SENSOR FOR THE VEHICLE STABILITY CONTROL (VSC), THE VSC CAN OPERATE IMPROPERLY IF THE SENSOR IS AFFECTED BY CERTAIN ELECTROMAGNETIC WAVES, SUCH AS FROM A CELLULAR PHONE.

Consequence Summary: SHOULD THIS OCCUR, THE BRAKE MAY OPERATE UNEXPECTEDLY, AFFECTING STEERING AND SPEED CONTROL, INCREASING THE RISK OF A VEHICLE CRASH.

Corrective Summary: DEALERS WILL REPLACE THE YAW RATE SENSOR.

Recall Notes: OWNER NOTIFICATION IS EXPECTED TO BEGIN DURING JUNE 1998.OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT LEXUS AT 1-888-333-9376.ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S AUTO SAFETY HOTLINE AT 1-888-DASH-2-DOT (1-888-327-4236).


LINK

http://repairpal.com/cars/lexus/gs400


YawRate sensor P# 89183-30050

 

thanks for that insight, I also have a 98 GS400. I hope it was replaced.

So is it customary to feel the actual pressurizing in the brake pedal?
I just remembered that my mechanic plugged up the diagnosis previously and many brakebooster master cylinder codes popped up.

I wonder if the nitrogen fix would help

 

yes, its normal, but like i said it should be a healthy pressurizing sound rather than a loud noise. i guess in your case it would be to get the codes and go from there, as i dont get any check lights.. ;-(

 

Good info on the nitrogen can.

Mine's a 99, the BMC still makes a "healthy" sound. *knock on wood*

 

I dont have any CEL but the codes are in the system though

 

has anyone gotten this fixed for free??

 

i had that pitch only when it was cold or very cold outside
always at the same speed (driving about 30mph, faster or slower no pitch) and after car worms up no pitch
last few days is at least 40 or above so no pitch but my brake pedal is soft and break weak
would recharging brake booster or buying new one (plus o-ring and spring) fix it or do i need new bmc?

 

Want to know about the YawRate sensor, too.