Porsche Repair Questions? Ask a Mechanic for Answers ASAP
Hey there, sorry for the delay.
So the vehicle starts and runs? While running there are no issues? just a long hard start?
Lastly, are there any fault codes?
please verify so we can continue,
Since your away at the moment, I will cover a few things while I await your return.
If the hard start occurred after a recent refueling, then it's likely the purge valve causing the issue. It's not very uncommon for the purge valve to get stuck (depending on the position) and cause hard starting from a rich/lean condition. This will also effect fuel mileage if you continue to drive like this.
Secondly the electronic throttle has been known to stick on start up, when the key ignition is activated the throttle body barely moves to its closed position setting, which allows enough air in to start the engine. When this sticks it has trouble starting. When this is the case you can usually depress the gas pedal slightly to get it to fire right up.
Sorry i was tied up for awhile.
When the brake pedal is hard, are you still able to use the accessories from the keyless functions? meaning the key is detected and you can still operate the radio etc?
Or does it seem like the vehicle is completely shut down?
Ok, thanks for clarification.
With your exact symptoms, it is usually caused by vacuum leak in the brake booster. Follow the vacuum line from the booster and inspect it for cracks, pay close attention to the are where the factory heat shrinks the tube on the end fitting because this is the most common location for leaks. In the mean time, you will have to press hard on the pedal Since have no vacuum assist for your power brakes.
If you need further assistance just ask.
If not be sure to leave a kind rating so that the site credits me for my time.