How is the valve lift of a Porsche Cayenne determined?
Valve lift is determined by the front O2 sensor. Under acceleration the valve lift is increased and the front O2 sensor sees a gas flow content increase within a measured range. A failing front O2 sensor will either not see or cannot react in time to the valve lift gas flow change.
Why does my Porsche Cayenne Jerk when I change gears?
Sometimes, this can also show up as jerking when the PDK is going through 2nd to 3rd gear changes and accelerating between 30-50mph. The problem stems from the transfer case in the four-wheel drive system and is a regularly reported issue.
Is there a problem with the Porsche Cayenne transfer case?
Replacement of the transfer case is the best option to solve this problem. While the transfer case has been revised a number of times, this issue appears to continue to plague the Cayenne. Seemingly as a result, Porsche recently announced an extension to the warranty period covering the transfer case.
What causes a leak in the front of a Porsche Cayenne?
The leak at the front of the engine is most likely from the upper front coolant pipe, which slips out of its housing when the glue fails. Porsche revised the design of the replacement part to be bolt in, so the problem should not return.
What happens if the transmission on a Porsche Cayenne fails?
Failure of the mechanism can lead to some wild gear shifts. Transmissions in the later cars are very complex and the technology involved is a closely guarded secret. Technicians at Porsche not trained to dissect the transmission and make repairs. Typically, they just replace the transmission.
Sometimes, this can also show up as jerking when the PDK is going through 2nd to 3rd gear changes and accelerating between 30-50mph. The problem stems from the transfer case in the four-wheel drive system and is a regularly reported issue.
Why is my Check Engine light on on my Porsche Cayenne?
Symptoms: CEL, Loss of Power, Misfire Under Load. There are multiple reasons why a check engine light can be set for misfires. A code scan can reveal which cylinder is misfiring but not usually exactly why. CEL – Misfire – Faulty Ignition Coil. The ignition coils on the Porsche Cayenne V8 have been updated a number of times.
Why is my Porsche Cayenne leaking steam under the hood?
Once they degrade and a leak starts it quickly speeds to a point where large clouds of steam can be seen billowing from under the hood when the engine is running – steam powered Cayenne! There is an update kit available to permanently fix this problem and change the plastic pipes to metal ones.