Re: '90 100/brakes?

[a6561TB@gnn.com ()]

>> >If I keep steady pressure on the brake pedal it will go down although
> not
>> >allthe way to the floor.
>> 
>> Yep, sounds like the bomb has lost  pressure, wellcome to the crowd.
> Does 
>> the brake lite come on also? The one which is also for the emergency 
>> brake/fluid level. If so, and you do not have any air in the system,
> then 
>> most likely the bomb.
>>  
>... I guess I missed the original post, but a gradually dropping pedal 
>sounds more like leaking master cylinder seals to me ...

Only if it were slowly dropping ALL the way to the floor( I dealt with this 
many times on various cars).

>IME the classic symptom of a bomb problem is the brake warning light
> coming 
>on when the brakes are depressed in an emergency stop situation, or the 
>sense of a loss of assist in the pedal in the same situation.  

Oh, then it means that the bomb replacement is at least one year overdue.
When the bomb starts to go it feels EXACTLY like an internal leak in the 
master cylinder, the pedal becomes spongy and gives gradualy with vibration 
with no fluid coming out. I lerned this the hard way: the first time I had 
this problem on my first Audi I replaced the master cylinder in vain ($130 
thrown away). 

BTW, the first sign of the bomb begining to go is when the brake light stays 
on for several seconds after you start the car. Then it goes out. Its the 
sensor in the brake servo reporting that the pressure in the bomb has 
exceeded the pre-set level and it has become operable (or not). When the N2 
the bomb was filled with, diffuses through the membranes ,the bomb loses its 
counter pressure. It takes longer for the brake sys to develop the pressure 
the computer wants to see - that is reflected by the light staying on for a 
longer period of time than it is normal.

When it happened on my 200 2 mos ago (the light was just beggining to stay 
on longer on the start up, may be by a couple of seconds only and the pedal 
decided to travel twice as long, not to the floor, though) I immediately 
knew it was a bomb. Now, $275 later the pedal is firm again and the lite 
goes out immediately after the start up.
 

Igor Kessel
'89 200TQ, chipped and MOMO'd through out,
in Tornado "arrest-me-officer" Red;
'88 Fox, "the FOX machine";
ex '85 5000s, "the EE's nightmare"
Phila PA, USA
a6561TB@gnn.com