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Common Car Noises and Their Likely Causes
Noise
More Details
Likely Cause
Fixing It
Clicking noise while turning
Starts faint, gradually becomes more noticeable until very loud
Failed outer CV joint (constant velocity joint) due to torn boot (most likely) or old age
Replace either the whole axle assembly (recommended) or the outer CV joint
Water pump noises
Difficult to diagnose because of water pump's location
Noise usually caused by damage to the bearings in failed water pump
Only cure is replacing it. If possible do it at the same time as a timing belt replacement to cut down on labor costs
Squeak or squeal from an engine belt
Loud, high-pitched squeak or squeal
Belts either need adjustment or replacing
If belts only squeak when damp, they probably just need adjustment. If they squeak constantly, they probably need to be replaced
Exhaust heat shield noises
Rattle that you hear when car is idling
Damaged heat shield
Replace heat shield
Common Car Noises and Their Likely Causes
Noise
More Details
Likely Cause
Fixing It
Clicking noise while turning
Starts faint, gradually becomes more noticeable until very loud
Failed outer CV joint (constant velocity joint) due to torn boot (most likely) or old age
Replace either the whole axle assembly (recommended) or the outer CV joint
Water pump noises
Difficult to diagnose because of water pump's location
Noise usually caused by damage to the bearings in failed water pump
Only cure is replacing it. If possible do it at the same time as a timing belt replacement to cut down on labor costs
Squeak or squeal from an engine belt
Loud, high-pitched squeak or squeal
Belts either need adjustment or replacing
If belts only squeak when damp, they probably just need adjustment. If they squeak constantly, they probably need to be replaced
Exhaust heat shield noises
Rattle that you hear when car is idling
Damaged heat shield
Replace heat sh
HELLO; IF THIS NOISE IS COMING FROM THE DRIVER SIDE FRONT WHAT YOU ARE HEARING IS THE ELECTRIC AIR PUMP WHICH IS NORMAL UNLESS IT IS REALLY LOUD OR MAKING A GRINDING NOISE. tHIS PUMP IS PART OF THE EMISSION SYSTEM.
It could be the fuel pump pressurizing the system. Does the sound stop after a few seconds? If it is the fuel pump then it is a normal sound. Fuel pumps will resonate in the tank when you are low on gas, making them sound louder. If it is more than a hum then I would get it checked out.
That noise is probably the air injection system which is part of the emmision system. When it is making that noise, open the hood and determine where it is coming from, note if it is a mechanical sound, etc. The air injection if equiped would sound almost like forced air scaping somewhat like an exhaust leak, but less intense.
It sounds like the check valve in the fuel pump inside your fuel tank is starting to fail. The check valve keep a fuel pressure in the fuel line, so the next time you start, the pressure is there and you get a rapid start. When the check valve is bad, the fuel pressure bleeds off and the pump must build up the pressure again.
BTW- When you turn the ignition key, the term is "cranks" or "turns over" until a start condition.
Hope this helps.
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