I have a 2000 Mazda MPV that moans, loudly, when idling. Once I step on the gas pedal the moaning stops. Other than the sound, the vehicle runs great. Any advise is greatly appreciated!
Make sure the intake tubing is intact and properly secured.
Since it’s doing it at idle you should also be able to find it by listening under the hood.
water pump,need alot more info then you gave.