Still searching the archives, but:

When I start my CGT from letting it sit for a few days, the Brake Booster Servo warning light comes on. I hit “okay” and it’s gone and everything seems to work fine. It doesn’t come on after subsequent starts that day.

The PPI didn’t mention this (obviously).

Question is, the manual doesn’t seem too worried about it.

Page 123 of CGT Owners Manual: “Brake Booster Warning: If the brake-fluid warning light lights up after starting the engine, wait to drive until the required pressure for the brake booster is established and the warning light goes out. If the brake fluid warning light in the instrument panel does not go out, there could be a defect in the brake booster.” (duh)

The workshop manual seems to say it’s not a problem for up to 1 minute after starting. ???

It only says to worry if it lights up while driving.

What’s normal? I have yet to check the fluid level and such, but the car was just serviced and it did it from the first start.

Anybody else see this? What’s normal, what’s broken?

Thanks!

Tim

 

This is most probably normal as vacuum created by the engine fills the brake booster with air.

 

I’ve found a couple of user posts now on various boards that say it’s normal. i.e., it happens to them exactly like I described.

If so, it’s interesting that Porsche would result to an immediate warning light instead of building in a short timer before turning on the warning. :-|

Still doesn’t seem right.

Tim

 

mine does it as well
mark

 

They all do it from what I've been told by my tech Tim...I remember my first drive of a CGT, I thought the rear end had gone from all the chattering and racket going on

 

Ha! The latter part of your sentence was going to be a topic of one of my upcoming threads. It sure is a mechanically noisy car. I have to really listen to discern the wail of the engine note vs the mechanical chatter going on. And, do all that while keeping an eye on the speed which climbs like no one’s business. ;-)

Thanks for the info guys. I really appreciate it. Just bear with me for awhile as I learn about my new beast and ask some dumb questions.

Tim

 

As stated above, it is "normal". It does it every time I start up the car. They should honestly just release a software update and program it out.

 

Normal - happens when you don't drive the car often (msg. appears on my father's CGT). Solution - drive it more!

 

The Chattering /Mechanical noises you hear is mainly due to the use of the twin plate Porsche Ceramic Composite Clutch (PCCC). This clutch was made for the Carrera GT as to be able to bring the engine, and transmission lower in the car so to get a very low center of gravity. Sometimes we just cannot get the best of both worlds i guess. Needless to say, the clutch plate diameter is surprisingly very small at 169mm (6.65") in diameter. I personally take my hat of for Porsche for introducing such technology in 2004. The clutch should not be slipped while pressing the throttle much, since this is the main reason some CGT owners are burning their clutches very frequently. I have a friend who had 3 clutches installed in less than 3000 miles of driving his car. That was very bad, especially when you consider the hefty price of the clutch + labour.

 

Wow, you definetly have some knowledge on Carrera GT's.