What Causes A Knocking Noise When You Accelerate Your Porsche Cayenne in Cary

For the smooth combustion process, the engine burns the right amount of air/fuel mixture in the car.

In general terms, when the fuel in the tank is igniting at the wrong time, it will cause a knocking sound.

Typically, the knocking noise can be more noticeable when you are running the engine under a heavy load.

The following points define the causes behind your Porsche Cayenne producing a knocking noise when you accelerate.

Lean air/fuel mixture

Lean air/fuel mixture

indicates that the amount of fuel in the combustion chamber is lower as compared to the air.

Due to the lack of fuel in each cylinder, the engine produces some detonations and causes a knocking noise when you accelerate.

Too low fuel octane

Thus, the engine of all the vehicles is designed in such a way as to run on a certain number of octane.

Using low-octane fuel can reduce engine performance and produce a knocking noise during acceleration.

Bad spark plugs

Spark plug can provide the spark to the engine for igniting the right mixture of air/fuel in the combustion chamber.

If it is failed, then it could cause a problem within the combustion process that may lead to a knocking noise.

Worn out bearing

When the bearing of the Porsche is failed, then the engine is making a knocking noise.

Bad knock sensor

Knock sensors can monitor the noises produced by the engine and regulate the fuel combustion time of the engine.

When the sensor is failed, the check engine might flip up and produce a knocking noise from the engine.

Conclusion

If the engine of your Porsche Cayenne is making a knocking noise when accelerating, then get it fixed immediately.