[RKDinOKC]

The brakes on the Cayenne Turbo are still buggered. It acts like the booster is going out. Hope replacing the booster and master fixes it and it isn't something to do with the ABS stuff or the front calipers buggered from that guy putting the wrong size rotors on the front. Sure acts like the booster is weak to me though. You can't push the pedal hard enough to brake hard enough to get the ABS to come on. They would be working great for a limo driver.

Brakes almost as bad as the Rover did when I got it. And the fuse was out that ran the pump that does the job of the booster on it.

Instead of a fluid pump to for the brake booster, Porsche uses a vacuum pump for the regular vacuum operated brake booster. The vac pump is because it is a Turbo so doesn't always have intake vacuum. The vacuum pump checks out.