When starting to drive if heater or ac is on, there is a metal squealing noise, if i turn off the heat the sound stops right away. if i keep on driving there is a loud tump and then noise is gone
Your AC compressor on the engine is the likely problem, either the pump is frozen up or the front bearing is frozen up, don't run the system or the belt will burn and fly off and strands you. Get this taken care of right away before winter. Have a local shop listen to the noise to confirm my guess as to the cause.
SOURCE: Sounds like some kind of heater door problem in
look under your dash in front of the passenger against the fire wall. You should be able to see the diverter controls. If they are vacumm operated, there may be one disconnected. good luck.
SOURCE: Loud buzzing noise
From the sounds of it, it's simply your air ride's compressor. If you're not aware that your vehicle has air ride suspension, read up on the user's manual or look on the web. When you start your vehicle and shift into drive or reverse, your compressor should start (assuming no doors are ajar). The compressor than fills all four airbags in your vehicle to a factory-set height. These airbags provide a softer ride than the conventional shock/strut system seen in less expensive SUV's and trucks but are also more prone to problems and damage down the line. You can isolate the compressor as the sound by going to your truck, removing the left hand side panel and switching your air ride off. Your car's compressor then should not kick in at all. However, you should not operate your vehicle with this switch turned off. You should only use it as a diagnostic reference or anytime your car is towed, hoisted, or jacked up. Hope this helps.
There
are many possibilities that can cause car to make noise.
It's
actually from where the noise is coming from. Front end or rear end. From
engine area or from inside the steering or from brakes.
There
is N-number of possibilities for the car to make whining noise or any other kind
of noise.
---------
For
step by step troubleshooting this problem, I suggest you to refer the help
links mentioned below. Its a complete solution with proper explanation to
identify the cause of problem: ------
Click
the link below: -----
Car makes clicking noise?
http://howtobyme.blogspot.com/2011/11/car-makes-clicking-noise.html
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Car makes whining noise like
driving on rough pavement?
http://howtobyme.blogspot.com/2011/12/car-makes-whining-noise-like-driving-on.html
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Chirping Noise From Car?
http://technoanswers.blogspot.com/2011/11/chirping-noise-from-car.html
----------------
What are the possibilities for
Clicking noise in car?
http://technoanswers.blogspot.com/2011/11/what-are-possibilities-for-clicking.html
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Squealing at start up on car?
http://technoanswers.blogspot.com/2012/01/squealing-at-start-up-on-car.html
--------------
Chirping sound coming from engine?
http://technoanswers.blogspot.in/2012/01/chirping-sound-coming-from-engine.html
-----------
Vehicle making Clunk Thump Thud
noise?
http://howtobyme.blogspot.in/2012/03/vehicle-making-clunk-thump-thud-noise.html
------------
4X4 Truck makes roaring noise in
the front end?
http://schematicsdiagram.blogspot.com/2012/01/4x4-truck-makes-roaring-noise-in-front.html
--------------
Heater makes clicking noise under
dash on Ford Explorer?
http://technoanswers.blogspot.in/2012/01/heater-makes-clicking-noise-under-dash.html
---------------
Clicking noise under dash and
front defroster not working?
http://technoanswers.blogspot.com/2012/01/clicking-noise-under-dash-and-front.html
------------------
Car Brakes Making Noise?
http://repairhelpcenter.blogspot.com/2011/12/car-brakes-making-noise.html
---------------
Car Alternator making noise?
http://repairhelpcenter.blogspot.com/2011/11/car-alternator-making-noise.html
-----------------
Car Alternator Bearing Makes
Grinding noise?
http://repairhelpcenter.blogspot.com/2011/12/car-alternator-bearing-makes-grinding.html
----------------
Engine makes noise and Cooling Fan
belt Breaks?
http://howtobyme.blogspot.com/2011/12/engine-makes-noise-and-cooling-fan-belt.html
--------------
Vehicle Makes Clicking Sound While
Taking turns?
http://schematicsdiagram.blogspot.com/2011/12/vehicle-makes-clicking-sound-while.html
-------------
ABS light comes on and Car makes
Grinding noise?
http://repairhelpcenter.blogspot.com/2012/01/abs-light-comes-on-and-car-makes.html
-----------
These will help.
Thanks.
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