Well there are lots of possible reasons, BUT Li key it is a vacuum leak, either the hose of Brake booster, and or intake is / has a leaking vacuum line.
making a hissing noise
Madagascan hissing cockroaches make a noise by forcing air out of a special hole.
when you breath is air and force it out with your tongue it makes the hissing noise
A hole in the chest ... the hissing comes from the leaking air.
A hissing noise
Yes, "fizz" is an example of onomatopoeia because it imitates the sound of a carbonated beverage releasing bubbles and making a hissing or sizzling noise.
Yes. They make grunting-hissing noises.
Possums make a variety of hissing and snorting noises.
Sibilant means making a hissing noise, particularly related to speech (e.g. making the noises of 's', 'sh', 'z'). Therefore sibilance means the quality or state of being sibilant.
A radiator is a device found in the engine of vehicles that cools the engine by circulating air. A good sentence would be, the radiator in my truck is making a hissing noise.
Roaring, purring, grunting, snarling and hissing.
Sheep do bleat and snake make a hissing noise.