Whining noise I've changed pump with aftermarket,changed belt, and idler pulley.the noise never changed..its there at idle and more so when accelerating to change gears. my kids hear me a block away...any ideas would help...i put a hose up to the pump and it does sound like thats my prob,even after i changed it.while idling if you take cap of pump even louder..whats this purge valve i keep hearing about and where is it

When in Park or Neutral does the noise change if you rev the engine? Whining noise generally come from a worn bearing so there will be a few things to check.
First check the serpentine belt. A loose or worn belt will cause noise. Carefully watch the belt with the engine at idle. Does it run smoothly or 'bounce' as it spins? Bouncing could suggest the spring in the belt tensioner is worn and has started to go slack.
Stand in front of the vehicle with the hood open and carefully listen to the engine. Sometimes you can hear if it is on one side of the engine or the other.
The most likely causes of the whine will be...
Power steering pump, A/C pump, Water pump, alternator pulley, belt tensioner and it's pulley or an idler pulley.
Parts like the alternator have more than one bearing in them so that could be another area to check. If the serpentine belt is off you can spin each pulley by hand. Listen and feel for a gritty growl as it spins. Bearings in good condition are usually smooth and quite.
Try this YouTube video. **NOTE** Be VERY CAREFUL if you try the tests in the video.

https://www.youtube.com/watch?v=JRHj9_pwx7o

I have a 2009 sedona replaced the idler pulley and the tensioner pulley and the whining sounds are gone $85 belt +pulleys

It might be the idler pulley or automatic tensioner. When either one dries up, the bearing wears out and starts causing whistling or whining noises, might need replacing. Try replacing the cheapest one, the idler pulley to see if it stops. If not, it might be your belt tensioner.

The lost acceleration is of major concern. Maybe you have lost your water pump. It would work great for a few miles when you start out and then gradually heat up and loose performance. The fluid would eventually boil over? Maybe a bearing on the camshaft is expressing it's discontent and causing extra load for the engine to overcome. Try to determine where the noise is coming from.
The serpentine belt connects the alternator, water pump, power steering, front timing pulley, fan, and front timing pulley. All these components generate a parasitic load on your engine. If the engine has to work harder because of increased load it could be any of these components. I'd definitely check the water pump listening for noise while running. Look for obvious things related to the belt and its' components.
Check the serpentine belt for wear. May indicate pulley misalignment or wear. There exists two idler pulleys that have small bearings that wear out and squealing noises. Check those for wobble with the tension off the belt. They are pretty cheap so replace them if any concern at all.
Power steering pumps cavitate and make a high pitch gear whining sound if fluids are low or gears warn of. Check the fluid and top off to the correct level.
Best wishes,
TF

sounds like idler bearings but you have to release the tension to check,Also you can check the rest of the pulleys also at this time. I dont think you have to drop the engine.

Possible low on fluid will make uniquik whine noise,But another common whine noise is fron serp belt idler pulley,noise will increase with speed.

Could be a few things:

Belt slipping- adjusted through tensioning bolt on bottom of power steering pump

Pulleys- take off belt and hand turn pulleys. Find one that gives resistance and possible makes the whining noise. It's probably the idler pulley.

This Noise Description sounds Indicative of the Sounds that come from the Serpentine Belt Or Related parts such as Belt Idler Pulley or Belt Tentioner witch also has a Pulley, but if Tensioner itself is Literally BROKE I've replaced a number like this it will cause a Whining noise . Best case scenario its just the Belt, and if any of the other Problems turn out to be the Culprit the Belt MUST be Replaced Anyhow as Damage is Being caused By the Very Whining you hear.
PLEASE Spend the Extras $ for the BEST BELT as this Drives your Water pump, Alternator, A/C Compressor, Power Steering Pump All Crucial to Control of, easy Steering ,All Electrical-Power Distribution, The COOLING of Engine << VERY CRITICAL Component
The Pulleys usually have a more Hum type Whining. So I would say at Best The BELT , And WORST Belt Tentioner is Broke

If it gets worse when turning the wheel at a stop, then it's the power steering pump. Could be the power steering fluid also. Check your belts for wear or damage. The idle pulley will make a constant noise, sometimes whining sometime screeching. To check idler pulley it is best to remove belts.