I know, probably tough to speculate without hearing it but I figured I try anyway. The past two days after driving home and parking in the garage I hear a high pitch noise, I think sounds like it's coming from the rear. It continues for about 5-10 minutes.

Weather here has been 100-104 degrees, I drive 40 miles each way to work. Anybody else ever experience something like this?

Is this noise happening with the car not running???

I noticed it when I shut the car off in the garage, it was pretty loud. So I started it up again and pulled out, it continued while running.

Most of my trip is traveling 80mph+ on desert highway so I guess that's why I didn't hear it earlier...

See if it will do it again. If it does then see if you can track down exactly where it is coming from.[i.e. gas tank area]

maybe fuel pump, but mine only whines when its bitter cold out.

I'm having the same problem and I pretty sure it's the fuel pump. Does anyone know if this means I need a new one? Would it be safe to take it on a 1500 mile road trip like this or should I replace it first?

REPLACE IT. If the pump is starting to go south, the last thing you want to do is help kill it by continuous operation on a road trip. Nissan made it easy to get to the pump (removal of back seat and cover plate). No excuses except for price, so good luck!

LvR, have you tried listening near the trunk lock area, there is a fuel pump relay hidden under the carpet covering. Also, this suggestion is not fuel related, but rather a brake and bearing replated, I used to own an 87, the calipers locked up on me, and the constant friction between the brake pad and the rotors caused a rhythmic whining metallic noise that can be likened to that of someone using a handsaw. Also, when wheel bearing goes, the grinding noise is also in that pattern. So when you have your windows up (A/C turned on, or when the weather is cold), the noise is baffled, and it may sound like someone is cutting wood, instead of a metallic noise.

I know and there is in fact 2 of them mounted there ..................

As you know Murphy would dictate that the friggin thing would shut up soon as you get near the trunk/tank/car and eventually the garage, so I have given up stalking the thing and are waiting for whatever it is to pack up and demonstrate what is wrong

Do you have access to a helper? (wife, kids, friends, strangers you trust ) lol

JD: Did you say the noise was there when the car is not rolling?
In that case I'd go with tripleGmax, fuel pump...

If it's only noticeable when the car is moving I'd say wheel bearing or brake related just like disgruntled said.

When ignition is shut off, the fuel pump is not powered and cannot make any sound whatsoever.

My old stock exhaust used to make crackling or ticking high pitch noise after I shut off the engine - try to go under the car and listen where it's coming from. The MIDAS exhaust I have now on does not do anything like that.

Yea, it still whines for about 5 minutes after shut down. I spoke with a few mechanics where I work, they tend to think fuel pump also.

I checked that one link above and saw someone mention that it could turn into a fireball? Never heard of that happening. I would think if the thing caught fire after the fuel pump went out that there would've been many a lawsuit by now...

What kind of prices have ya'll paid for a fuel pump (non junk yard)?

LOL, that was my thread from a some time ago. no fireball, that is bs. i think worst could happen is your car wont start. just get it fixed.....maybe try new filter first see if that works. dont beleive everything you read.

Boeing 737 have Honeywell fuelpumps with faulty wirings, they tend to explode... yea, means lots of lawsuits. I suppose they might be changed by 2015...have fun. Ford has faulty SUV roofs, will not add 50$ piece of metal to keep the roof from collapsing. Been so 20 yrs and lawsuits all the time - but will not do anythin. So is GM etc. They are abs real neglicent criminals... The 911 is peanuts to their deeds; every year they kill more ppl. All this is result of the quartal shareholder value...

If u sound is five minutes after ign off, cannot be fuelpump. To make sure take batt off, that tends to zap all running electrons...

Depends on your noise volume... always theres vacuum in the tank, and the air passing the airvalve could whistle for five minutes. The whistletime is different with full tank. Take tank fill cap off.

easy way to check the fuel pump is pull the back seat and undo the access hatch to take a listen.
if it is the fuel pump, then you need a new relay at a minimum, but probably not a pump