Question about 2004 Mazda 6

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What could be causing my car to be making a very loud humming/whining noise at idle

At idle it is very loud humming noise and when driving you can still hear it but not as loud. It still made the noise after I took the serp belt off.

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  • Mazda Master
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Bad/loose belt, bad/going water pump. bad/going alternator.

Posted on Apr 09, 2015

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How do I find out out what is causing the very loud humming/whining noise.


Did you check your pcv valve on the other Asian cars the diaphragm gets wholes burnt in and causes that a lot will also cause a slight miss .
My number is 270-556-7357 you can text me more about and I will help you all I can

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2004 Saturn Ion standard. Is making a loud humming/buzzing noise. Sounds like it is coming from the front right part of the engine (where the belts are and alternator). It makes the noise when idle and...


More info - If it only makes the noise when the car is moving its probably a wheel bearing - if it makes a whining noise whether its moving or not it sound like the power steering pump is on its way out - it could be as simple as adding fluid - start the vehicle and while sitting there turn the wheel left and right - the noise should get louder and softer - if it doesnt - its one of the other accessories - a/c pump or the alternator itself -

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Nissan navara D40 making winding/whining noise when over 1500rpm


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SOUND LIKE FUEL PUMP.CHECK PUMP PRESSURE BUT MOST OF THE TIME WHEN FUEL PUMP GOING OUT YOUR HEAR HUMMING OR LITTLE WHINING NOISE.FUEL PUMP MOTOR BEARING WORN OUT.

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