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Car just started making small whistling sort of noice but stops once I start driving. It gets louder if I put on air conditioner.

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  • Cars & Trucks Master
  • 3,519 Answers

HI Ann:
With the engine off, check the tension on the serpentine belt. Also, try spraying some conditioneron the belt. Safety first!!! Watch your fingers and moving parts.

Posted on Apr 08, 2015

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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motor1258
  • 6674 Answers

SOURCE: Car makes funny noise upon starting on very cold days

Have your power steering belt checked and adjusted, or replaced if worn.

Posted on Jan 22, 2009

  • 333 Answers

SOURCE: 2004 honda odyssey making whistle noise

Could be the squeler on the brakes. Does that to let you know it's time for brake job. Have your brakes checked

Posted on Mar 28, 2010

chromapr
  • 267 Answers

SOURCE: Air conditioner works then stops blowing cold air

when you day the air goes on and off i assume you mean the compressor goes on and off. that is what moves th freon through the system. if you are getting cold air when the compressor is running then the problem is that the compressor is stopping and that would be because a pressure switch may be bad. it is possible that model has a thermal shut down too say if the compressor was low on lubricant and was overheating when it does run. but if it is a pressure switch that is failing and they do, it is an easy fix. if you follow the ac lines you will find the switch.it is small about the size of a sparkplug-attached to the ac line and will have a connector with two wires. if the car is running and ac is on but the compressor is not turning remove the connector and jump to two wires. the compressor will start running if the switch was bad and we are sure there is a good charge on the system. if you are getting cold air there should be a sufficient charge to close the switch. these switches can be removed without losing any freon. there is a valve below them that will shut off when the switch is removed. then all you have to do is get a new one and screw it into place,apply the connector and you are done. if that is the problem. hope this helps please let me know and good luck

Posted on May 19, 2010

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  • 2 Answers

SOURCE: My air conditioner makes a squealing sound when I

I have the very same problem with my 99 Nissan Altima. I have replaced both the belt and the tension idler. I believe it may be the AC idler pulley.

Posted on Aug 27, 2010

  • 1 Answer

SOURCE: BMW 328I No Heat ..Cold air only

I have the same problem start with my 2004 Honda Civic Si today. I checked the coolant and it looks fine. I can see it being the thermostat, but a water pump runs of a belt, doesn't it? That either seizes and stops or it works, I would think, so I'm wondering how the water pumo coild be the problem?

Posted on Nov 24, 2010

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1 Answer

Making whistle noise on off on run and stopping.


There are basically two types of whistle noises.

* Whistle when you get more gas (increase RPM, put gas pedal, sometimes just idling but louder when you put more gas)
This usually intake-side leak.
Intake manifold itself, intake manifold gasket (most likely), even airfilter housing, Airflow meter housing (connector), anything where air goes to engine.
usually engine get rough or unstable idle when intake leak occur.
Engine knocking or pinging may feel.

* Whistle when you decrease RPM (engine brake, reduce speed, sometimes just idling but louder when it dropping RPM)
This usually Vacuum-side leak.
There are many vacuum hoses in engine room. even inside of cabin (heater control, etc)
Try to spot where it coming from.
Vacuum also connected to Brake servo, heater control and spark timing.

Put metal or plastic pipe (small PVC pipe will work fine) to one of your ear then isolate source of noise and find where it come from.

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1 Answer

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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1 Answer

When I crank the car after a few minutes of being on it starts to make a humming noise. It starts very faint and after a while of driving it begins to get louder. If the air conditioner is on then it...


Without more information it is hard to tell. Is the humming noise variable depending on the speed that you are driving or constant? Could be ground, radio, pulley, compressor noises hard tell.

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Hi. This will be caused by deteriorating, or defective weather stripping. During driving, air is pushed through worn, or damaged weather stripping, thus, creating this whistling sound you are hearing in the passenger compartment. Water allows the small hole, or cracks, to emit the sound at a louder rate. This could be a manufacturing flaw(poor weather stripping installation, or defective composite). This is repairable, but you will need to locate the worn weather stripping. Once located, and exposed, you can order a replacement weather stripping kit from your dealer.

NOTE_ Most common location will be the front windshield weather stripping. the rear window, and side windows are to be checked, as well.

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Sounds like a fan belt problem if its burning that bad for that long it's likely to need to be replaced by now. Tightened the same day it started may have saved the belt

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its proberly what they call a secondary air intake pump - what this does is increase the air flow only on cold start up - the colder it is the longer it stays on - if the noise gets louder and you will notice - get it changed - we have the same problem over here on the vauxhall omega and corsa's - bless em got to be GM

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maybe is the air compresor and that's the noise that you hearing. Put the air in off if the noise stop, your problem is the compresor.

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1 Answer

Isuzu Rodeo 1995


as for the whistling one of the vaccum hoses is down check the actuator hoses and you wont get no whistling and as for the temprature you gotta be more specific

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