Noise at higher RPM

[Gamingphreek]

Hey guys, this seems like a belt to me but, since I am at College I can't do much in the way of inspecting what is wrong.

I have a '95 Toyota Tacoma that runs great. However, starting at 3750RPM (Regardless of whether it is in gear or not) I get a high pitched whining type noise. If I drop below that it immediately stops, but as long as I am in the upper ranges of the Tach it makes the noise.

Since the truck is an I4 I need to be around 3500 and up to get up or accelerate up the mountains surrounding Virginia Tech. Not to mention if I ever need to accelerate in a hurry I don't want the noise.

My first guess was Serpentine Belt, but does anyone else have any ideas? Also does anyone have any ideas on price? Keeping in mind that I'm at College, any chance the suggested repair could be a DIY?

Thanks Guys,
-Kevin

 

[Toastedlightly]

if its at a certain rpm in any gear, regardless of load, sounds like something is just resonating. See if someone can localize it while revving the truck up slightly.

 

[Gamingphreek]

Its not a whistling type noise... it is more of a squeaking whine. I'm sure everyone hear has heard the noise before if they have been around cars enough. I just never bothered to look into it (Nor am I around cars too too much)

-Kevin

 

[Gamingphreek]

Listening to it with the hood open... it doesn't quite sound like its coming from the serpentine or auxiliary belts. It sounds like it is close to the area around, what I believe to be, the master brake cylinder. Anyone have any ideas (FYI: The sound sounds like it is coming from the left (driver's) side of the car)

-Kevin

Edit: Oh and if you gas gradually enough it doesn't make the noise. If you blip the throttle fast enough it does it at the lower ranges as well. The noise gradually increases over the period of about a second or two if I am doing it while in gear accelerating.

 

[Gamingphreek]

bump anyone?

 

[ValValline]

Check the vacuum line running from the brake booster to the engine for cracks.