Question about BMW X5

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I was driving along and all of a sudden I heard a whistling noise and the engine would only go 20 - 30 mph and when I put my foot down it just sounds like a whistling noise. Thanks

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Did you check to make sure all of your spark plugs are in their holes?

Posted on Jul 31, 2009

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After oil change on 2010 mercury mariner I hear a whistle when i accellerate


Did you remove any plastic/metal splash shields under there to get to the oil plug/filter?
Make sure you put those back in correctly as they could catch air and make noise if put in wrong.

Other than that, I can't think of anything oil change related that would cause a whisteling sound.

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A whistling noise can be generated by an alternator at high RPM's and indicates a slip ring brush problem or a diode failing . It resembles a frequency whistle.. IT may also be from a leaking gasket and a partially blocked exhaust system from a failed cat converter and at speed and power, the exhaust gas is forced out the hole

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Whistling sound coming from right rear


Checking Window Seals - The window seals (weather stripping) in your car are used to seal the water and wind for entering the passenger compartment. When these seals fail from damage or are eroded by the weather they can allow wind noise to enter the passenger compartment. This failure can cause a whistling noise as the car is driven. Some noises are only present when the vehicle is driven at certain speeds such as 55 MPH. These whistling noises can be difficult to find since you are driving at the time. Have a passenger help with the diagnosis by running their hand along the area the noise is being generated from. Once the noise source has been located replace or repair the failed seal and recheck.

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Whistling Noise whilst driving


As with all unusable vehicle noise complaints it is important that the noise be listened to first hand, so have a shop test drive this with you on board to point out the noise to them when you hear it start in your vehicle

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1995 jeep wrangler whistling noise when accelerator pedal not down


Sounds like a vac leak, could be the power brake booster or a hose.

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1997 s10 2 wheel drive truck. 4.3L v6 makes a loud noise as the car accelerates fast or under load. When running 55 I can release the gas pedal and the noise is not audible. I can put the truck in neutral...


Your noise sounds like it is power train related,If you have eliminated the engine,Since it doesn't make the noise while moving and in neutral.
It sounds like a universal joint in the drive shaft.Do you notice a vibration
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Check the idler and tensioner pullys for your serpentine belt. I suspect the whining noise heard earlier was due to the fact one was getting a bit stiff or rough turning. When you gave it that extra fuel, the sudden load may have finished it off. Sometimes they lock up, and sometimes they fall apart. Check those items first.

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2008 toyota tacoma whistling noise


I don't know how loud the noise is, but its weird that you mention 50 mph. At that speed or above you are keep a constant rpm level. I say this because it might just be your air box loose and the sound of the intake air is making it. A 2008 truck should not have any major problem. Sometimes an alternator will sing or whine but never heard anyone say something is whistling. One other thing is sometimes for some reason ive heard a noise like that coming from the speakers of my car that goes up and down with the speed of the motor, but that was when I was tinkering with speakers and sub outs and amps. Thats all I can think of.

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Squeak in front of engine 2002 taurus


I assume that the noise changes with engine RPMs, not vehicle speed since you mention washing down the engine - something pretty hard to do if the car is going down the road-
Is it possible that what you describe as a squeak is instead a whistle? The symptoms you mention related to water could mean that an intake manifold gasket (or another part of the intake system) has a bad gasket and is causing a whistling noise from air being pulled in where it shouldn't happen. If the failed gasket is allowing water into the intake system, that would explain why the engine sounds like it wants to die. 
You might take a 2-foot length of vacuum hose or similar, hold one end to your ear and move the other end around the engine to see if you can more accurately isolate the source of the noise, be it squeak or whistle.    Obviously, don't hold the hose too tight in case you get tangled up with a belt or rotating part.
Good luck-

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