I have been spending alot of time with the key in the accessory position and the hood open.
I noticed a very high pitched whine seemingly from the front of the engine. Possibly in the engine intake valley. The noise does not appear to be comming from the under hood ECU compartment (that is a different noise). This noise is fairly loud and constant. What could this be?
Again this is with the engine off and just the key in the ACC position.