droning sound from engine 1800-2500 rpm

[markow202]

Hey guys - recently my 13 Sky with 58k started making this droning vibrating engine sound when its using all its torque around 1800-2500 torque and quickly vanishes as soon as the rpms get higher and sounds smooth - its hard to explain and first thought it was engine mounts in which passenger #3 mount and all the ones atop the dealer replaced just now under warranty. Sound is still there and more pre-dominant when using the AC in which the engine has to work harder.


Im thinking it would maybe be the non OEM air filter installed a few months ago before I start chasing the dealer again?

[morganc]

Could be exhaust hangers getting soft and resonating as well as the resonator in the exhaust working itself in. Unless you've put a CAI in, the air filter won't have any impact on noise. If you can stand the noise then I wouldn't worry about it.

[markow202]

Could be exhaust hangers getting soft and resonating as well as the resonator in the exhaust working itself in. Unless you've put a CAI in, the air filter won't have any impact on noise. If you can stand the noise then I wouldn't worry about it.

No CAI....its more apparent with the AC on and when there is more of a load. Usual in the part of low-end RPM torque being used. Otherwise car runs very well and no warning lights.

[spugenpower]

I'm having the same problem with my 16 GS sedan with 97,000 Km. What I've noticed also is that when I shift it to neutral and the car is on idle, the RPMs fluctuate for a couple of seconds and then goes back to normal. The car is bone stock so I'm thinking the spark plugs need to be replaced.