lg2002541
01-31-2008, 12:57 AM
my car is makeing a very annoying whistling noise on the highway. I've been aware of this noise since 2006. I've having this noise for two years and nothing wrong with my car except the valve tick noise.
whenever I drive on the highway or drive at speed above 45 , I hear the whistling noise, like someone is whistling at you softly. It gets louder at higher speed and gone when I lift my foot off the gas. (I guess it's not from the wheel bearing.) It comes from the engine bay, I'm sure of that.
Any one know how can I find out? What kind of components can make this sort of noise, like some one is continuously whistling at U.
list of my guess:
1. the valves, lifters, for they make noise at low speed?
2.can be the altnater, cuz i just changed my battery today(it finally resigned after 5yr of service)?
3. the main bearing,lol?
4. some thing in the fuel system, like the fuel rail( I can tell a noise different from the valve tick near either ingector or fuel rail when cold Idling)
5. Air intake, or intake manifold leak?
6.throttle, for the noise gone immediately if i let go of the gas?
7 a BOV looking part mounted on the throttle, very Suspicious, because i noticed it several times that when I turn on the ignition just before start, I hear ths thing makes some funny electric noises.
8. tranny, because the noise comes out at high speed, so it might be the 4th gear?
9.a bad belt( I get 75k miles on my car w/o any belts changed)?
conclusion: It must made by a moving part!!!
Too many possible noisy components, haha. Just try to make it run better. Help words plz~~~~~~~~~~~~~~~~~~~~~
whenever I drive on the highway or drive at speed above 45 , I hear the whistling noise, like someone is whistling at you softly. It gets louder at higher speed and gone when I lift my foot off the gas. (I guess it's not from the wheel bearing.) It comes from the engine bay, I'm sure of that.
Any one know how can I find out? What kind of components can make this sort of noise, like some one is continuously whistling at U.
list of my guess:
1. the valves, lifters, for they make noise at low speed?
2.can be the altnater, cuz i just changed my battery today(it finally resigned after 5yr of service)?
3. the main bearing,lol?
4. some thing in the fuel system, like the fuel rail( I can tell a noise different from the valve tick near either ingector or fuel rail when cold Idling)
5. Air intake, or intake manifold leak?
6.throttle, for the noise gone immediately if i let go of the gas?
7 a BOV looking part mounted on the throttle, very Suspicious, because i noticed it several times that when I turn on the ignition just before start, I hear ths thing makes some funny electric noises.
8. tranny, because the noise comes out at high speed, so it might be the 4th gear?
9.a bad belt( I get 75k miles on my car w/o any belts changed)?
conclusion: It must made by a moving part!!!
Too many possible noisy components, haha. Just try to make it run better. Help words plz~~~~~~~~~~~~~~~~~~~~~