I purchased my former TR-6 as a garage queen. It had sat for 6 years, fuel
jelled in the carbs and fuel line, etc. I spent a day to get it running and
drove it from Houston to the Detroit area over the New Years holiday. I had the
SAME SYMPTOM OF A NON FUNCTIONING POWER BRAKE BOOSTER. Two days after arriving
with the car in Michigan I drove it to my insurance agent to review/photo. When
I proceeded to leave his office, I backed up and when I put my foot on the
brakes, the petal went to the floor. If it were not for the 5 or 6 inches of
snow cover in the parking lot, I would have punched a large dent in the quarter
panel of a very new Jag. My master cylinder had failed - even pumping the petal
had no effect. In hindsight, I suspect that I did not have safe brakes from the
moment that I bought the car and drove it up Houston. Replacement of the MC
cured my poor braking problems.
I would suggest a test of removing and plugging the vacuum line to the booster
and seeing if the brake performance decreases. If that is the case, you
probably have a MC issue. If not, unplug the vac line and see if you have a
vacuum in the line at the booster. The line to the booster could be plugged.
Date: Fri, 15 Sep 2000 18:39:49 -0400
Subject: Re: TR6 Brake Booster
I still haven't heard from anyone that can explain why a booster that
doesn't leak provides no braking assistance.
The car passes the test where the brake is applied and engine speed is
observed. That is, there is no change in idle speed, indicating that the
vacuum system is intact.
However, the car remains hard to stop.
One of the gents on the list is experiencing the same problem and has a
new booster on order. He's promised to get back to me with the results
once it's installed.
In the meantime, is there anyone else with such an experience, and
perhaps a solution, to share?
CONFIDENTIALITY NOTE: This message contains information which may be privileged
or confidential, or exempt from disclosure under applicable law. If the reader
of this message is not the intended recipient, or the employee or agent
responsible for delivering the message to the intended recipient, you are hereby
NOTIFIED that any dissemination, distribution, retention, archiving, or copying
of this communication is strictly prohibited. If you have received this e-mail
in error, please notify us immediately by calling our office at (905) 669-2888
or by return e-mail at email@example.com, Attention: General Counsel.