Whistling noises that occur when accelerating a vehicle are often due to vacuum leaks under the hood. If a vacuum leak is the cause, the car is likely to make the same noise upon pressing the accelerator when the vehicle is idling.Continue Reading
An automobile relies on constant vacuum pressure to operate correctly, according to 2CarPros.com. The engine uses a series of hoses and gaskets to maintain the vacuum. A leak allows air movement through a small space to set up high-pitched sound waves, creating the audible whistle. Increasing the throttle increases the vacuum and the speed at which the air passes through the leak.
Vacuum hoses attach to the intake manifold and supply the needed vacuum to accessories such as the power brakes. These small rubber hoses often degrade over time due to the heat of the engine. They tend to crack or break near the ends where they attach to other parts. The use of an automotive stethoscope is helpful in determining the location of the leak, as with other car noises.
As vacuum leaks grow larger they affect the performance of the engine. The leak often results in misfiring of a piston. If the misfire is significant enough, the vehicle's check engine light ignites.Learn more about Car Parts & Maintenance
Dirty fuel injectors or vacuum leaks can cause a car to hesitate when the gas is pressed. It can also be caused by low fuel pressure.Full Answer >
There are numerous reasons a car stutters when accelerating, including vacuum leaks, wiring issues and faulty sensors, according to AutoHub 360. In some cases, bad weather can cause this problem. When the engine is cold, moisture can collect on the distributor cap and cause the electrical current to the engine to misfire. When a car stutters during acceleration, it is a symptom of an underlying engine issue.Full Answer >
Common causes of vehicle sluggishness include transmission problems, failed oxygen sensors, hose leaks and damaged valves. CoastViews Magazine contributor Sherri Ingalsbe writes that sluggish vehicles experience reduced fuel efficiency and often exceed legal emissions requirements. Transmission problems are notoriously expensive, but many other causes of sluggishness only require replacement of inexpensive components.Full Answer >
Signs of vehicle engine malfunction include lit dashboard warning lights, irregular movement or jerking, strange noises, bad odors, and smoke from under the hood, exhaust pipe or air vents. A professional should inspect the cause of any of these symptoms as soon as possible to avoid potentially hazardous failure.Full Answer >