One problem related to engine funny noise has been reported for the 2013 Honda Pilot. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2013 Honda Pilot based on all problems reported for the 2013 Pilot.
Vibration, humming noise while in eco mode. At slower speeds while feather gas, eco can sometimes seems to get confused abruptly turn off causing a jolt like feeling. At times, eco seems confused whether to fire on 2, 4, or 6 cylinders and can become in almost what I call an arrhythmia type feeling, with the vibration jumping around until it finds what it wants to do. Noticed the issue since I drove it off the lot. As expected, dealer says they can't find any issue. Vibration can be so bad that I sometimes think it is the road, but it is not. Would dump car but would loose money. Very unfortunate and will not be buying a Honda again. If you are looking into one, please be sure to test drive at all speeds, especially cruising at slow and faster speeds. Cruising and feathering the gas is when you notice it most.