Hyundai Repair Questions? Ask a Mechanic for Answers ASAP
Good morning. Sorry for the delay you have received, my name is ***** ***** I am a fully qualified vehicle technician with over thirty years in the trade, hopefully I can help.
As you have described the noise as a pinking noise, that may be exactly what it is, although modern engines do not allow for adjustment of the timing, this should still be done electronically.
Your engine incorporates a knock sensor, which at early signs of pinking / knocking should adjust the timing to compensate before the condition begins.
This knock sensor is located at the front of the engine block and if faulty would often not throw a fault code but would just not perform its task.
I have attached a screenshot showing the position of this sensor (number 14). The method to test the sensor is with the engine running to tap the cylinder block next to the sensor whilst the engine is ticking over. as the sensor detects the knock you should hear the rev's alter slightly as the system adjusts the timing. If this does not occur then the sensor or connection may be faulty.
I hope this answers your question but do please feel free to ask any further details by replying to this thread.