hissing, HELP!!!!!
Supreme Member
iTrader: (3)
Joined: Apr 2008
Posts: 3,002
Likes: 64
From: Wittman,Az
Car: 86 IROC-Z, '71 RS
Engine: 305 TPI/ 350
Transmission: 700R4/TH350
Re: hissing, HELP!!!!!
Maybe you have an angry snake stuck under your car? Ok, J/K!
You probably have an exhaust leak. Have a friend who is wearing a glove(s) Plug your exhaust while you listen. Should make it more obvious and easier to hear.
You probably have an exhaust leak. Have a friend who is wearing a glove(s) Plug your exhaust while you listen. Should make it more obvious and easier to hear.
Senior Member
Joined: Apr 2007
Posts: 668
Likes: 0
From: wallingford,ct
Car: 91 formula ws6
Engine: 355 tpi OBDII
Transmission: 4l60E
Axle/Gears: 2.73 with 4th gen brakes
Re: hissing, HELP!!!!!
vacuum leak. sure its not from under the dash? i had my heater control diaphragm go bad and it hissed forever. was annoying cause it got louder when you got on it.
Supreme Member
iTrader: (2)
Joined: May 2009
Posts: 3,371
Likes: 2
From: Delaware
Car: 91' Firebird SOLD
Engine: 350 TPI +bolt-ons
Transmission: 700r4
Axle/Gears: 3:42
Re: hissing, HELP!!!!!
Could be a vacuum leak . Get an assistant to sit in your car and open your hood to listen for the sound right as your assistant turns the motor off. You should be able to hear a sucking, or hissing sound as the motor dies.
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