hissing noise for my eg b16a civic

[mugen24]

my car had some hissing noise recently, and i couldn't find where r they coming from.
sounds clear and very annoy me. they do not happen constantly, maybe 5 times a day, maybe nothing a day.

if it's happened, it would last very long unless i brake to stop the car...when i brake it, the sounds changed a bit. this week the hissing noise has been happened more and more times...i become to worry about it.

is that the brake booster? and what else can cause this hissing noise?
thanks:)

[B18cEG]

Is it maybe a hissing/scraping noise because ur brake pads are very worn?

Thanks

[90LAN]

vacum leak in the seal of the booster
i had this problem before

[mugen24]

the hissing noise is not came out when i brake the car, it's usually came when the car is running and it would last for 10+ minutes if there is no redlight to stop me.

[mugen24]

how can i fix it and what sought of parts do i need?
is it really a safety issue, i mean will the brake stop working if it's getting worth.

[90LAN]

i replaced it with another brake booster problem fixed
make sure it is coming from there before u start doing anything

[mugen24]

coz it doesnt happen constantly...thats why it's hard to be found by mechanics i think. if it is the brake booster...do i face any safety issue b4 i fix it up? thanks

[90LAN]

anything to do with brakes i would fixing straight away
simple as that

[mugen24]

true...how much u pay for the brake booster and can i use a dc2r one for eg civics?

[90LAN]

depends 100-300 average
u can use eg/ dc2/ ek
i have used all of these on my eg