Question about 2004 Nissan XTerra

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Air Condition When air conditioner is turned on it makes a vibrating sound, and it gets colder only when the vehicle accelerates

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Check your compressor mounting and belt. Loosely mounted compressor will rattle when the magnetic clutch engage. A compressor with loose compression (defective valves or out of specs clearances) at any speed will not result to giving you cool air since the the required pressure ratio will not be met. The suction pressure will always be higher than normal and the discharge pressure will be lower due to the by-passing compressed gas.

Posted on Nov 13, 2011

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It sounds like a loose compression compressor.

if the compressor is loose compression, normally it sounds noisy. then suction pressure is above normal and if you accelerate and maintains that high speed, let say 2000 rpm, the suction pressure goes down to the normal level and cools your air conditioning .

tnx 4 using fixya...

drcool

Posted on Aug 29, 2008

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1 Answer

My ac is charged and works; it blows cool but how or what do I need to do to make it blow colder? It has already been retrofitted for r134a.


the only way to make it colder is to set the thermostat colder in the evaporator or clean the muck out of the evaporator fins
Test the temperature at the vent by placing the thermometer in the vent and it should be around 10 degrees c
The temperature is not taken in the car as there is too much thermal efficiency lost form the vehicle
Remember that while air condition feels to produce cold air ,what is making you feel cool is the fact that the air conditioner is removing the humidity from the air in the car
Take it to an ac accredited service centre for testing as the TX valve may be partially blocked

Jun 01, 2015 | AC Cars & Trucks

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2005'Towncar. 40k miles. Started making an odd sound on acceleration; hard to describe but sounds like it is coming from passenger dash side. Maybe an air noise?? No sound on very soft acceleration


Turn off heater/air conditioner and accelerate briskly. If noise does not occur problem is probably a regulator in the heater/air conditioning system located under the dash.

Feb 14, 2015 | 2005 Lincoln Town Car

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How do I check the Air Conditioner spark plugs in my 2002 Malibu?


Sounds like it is low on the coolant which causes it to only work part of the time. You could probably take the car to a auto parts store and at least here in the midwest, they can help recharge your freon/R22 so you have a good working air conditioner. If that is properly charged and leak free, then your air conditioner compressor might be going bad, but then you would hear a lot of belt squealing when it wasn't working. Most likely though it is just low on the freon/R22.

By the way, air conditioners don't have spark plugs......LOL

Jul 05, 2014 | 2002 Chevrolet Malibu

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Vehicle stalls when turning and at highway speed


Check motor mounts and transmission mount
Also check the air tube (TOP AND BOTTOM) for hairline crack.

A loss motor mount can cause excessive vibration and damage the air inlet tube.

Jan 15, 2014 | 1991 Buick LeSabre

1 Answer

1997 expedition after i go over 40 miles engine is growling shifting but a littlle sluggish


I have had similar complaints that turned out to be the Idle Air Control (IAC) solenoid. The solenoid can get a little weak and air coming in through the intake at certain speeds can cause it to start vibrating. It sets off a moaning sound that resonates through the intake ducts and can get VERY loud. Sometimes it almost sounds like a fog horn.

If this is the type of noise you are hearing, replacing the IAC will fix it.

Other than that, the only suggestion I have is to see if you can get it to make the noise while the vehicle is sitting still. Slowly accelerate the engine speed with the vehicle stopped and the transmission PARK to see if it will make the noise. If the vehicle has to be moving to make the noise, then that eliminates several possibilities like the IAC, fan clutch, pullies, etc.....things that operate the same whether the vehicle is moving or sitting still.

Nov 22, 2011 | 1997 Ford Expedition

2 Answers

03 H2; air conditioner makes a clicking sound when on AIR and you accelerate. Does not do it when air is off. Also, back tail light keeps going out even when you replace bulb. Thanks


Clicking sound you hear is the belt tensioner, due to a malfunctionig a/c compressor ,

the reed valves of the compressor are broken causing unstable pressure that makes the belt tensioner vibrate

Jun 28, 2010 | 2003 Hummer H2

1 Answer

Air conditioner compressor vibration


bearing in ac pulley is faulty

Nov 03, 2009 | 2002 GMC Yukon XL

2 Answers

Vibration and noise coming from front end.


Try this . Find an empty stretch of road . Accelerate teh vehicle to 30 mph ,while you switch the transmission INTO NEUTRAL, making sure there are no other vehicles in or behind your path. Listen and feel for your problem. Still feel it ? I would raise the vehicle in the air, and inspect ALL 4 TIRES for OUT OF ROUNDNESS. Cupping will not only cause a vibration, but also a noise. Hope this helps.

Apr 27, 2009 | 2001 Buick Century

1 Answer

Uncertain if it's really a transmission problem


Being as it's over 200,000 miles, I'd definitely check into these things before assuming it's a transmission. As it very well could be a transmission problem such as, bad torque converter or a problem in the gears. It also could be as simple as a poorly balanced tire, or a wheel bearing going out. Check these before assuming it's a transmission as it could turn what you might think of over $1000 problem into a $30 fix.

As you Said, Air filter, or fuel filter.
New tank of name brand fuel... BP, Shell, Citgo, etc...
Tire Balancing
Wheel Bearings
Even check the brakes, a bad rotor or dragging pad may cause a vibration.

Now in the case that it's something else, here's a couple ways to check the transmission yourself to see if it's causing a problem.

1 : Find a steep hill and stop on it. Accelerate throughout first gear, see if it vibrates there at all. Make sure to put it into first gear so it won't shift out. If there's no vibration, try it in second, third, so forth.

2 : Many actual transmission problems are more notable in reverse as the gearing is actually turned backwards and made more evident. So try it in reverse, see if anything abnormal is experienced.

3 : Find a parking lot and make sure you have some space. Turn the wheel all the way to one side, left or right. Lay into the throttle and listen carefully. A clicking sound will denote a bad pivot joint in an axle or a bad wheel bearing. Try this in both directions as well. As a lot of times only one side will make noise and only if you're turning in that direction.

4 : Another good way to check for transmission problems is by engine braking. Use first or second gear to keep the vehicle slow while traveling downhill. Not at high speed, but enough where you can feel the vehicle being held back. Any slipping or vibration can denote a problem with the transmission.

Try these steps and see if you can narrow the problem down. Once you get it narrowed down; it's time to search for the right remedy whether it be a $20 air filter or a $700 transmission rebuild. I hope this helps you out bud!

Sep 24, 2008 | 2004 Isuzu Ascender

3 Answers

RE: 2001 Nissan Altima air conditioner


Sounds to me like you need the alternator idler pulley. Look at it and see if it has a big washer covering portion of the pulley, or if the washer is inside the pulley. If its inside, than you have an old pulley. Replace it with the one, that has the big washer in the middle of pulley. You do have another idler for the A/C compressor. Those I have seen fail also. But 80% of the time its the alternator idler pulley.

Jul 14, 2008 | 2001 Nissan Altima

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