Hissing. - Toyota Nation Forum : Toyota Car and Truck Forums

EverReady · 06-03-2008, 06:23 PM

Today I was coming home from school and I noticed a hissing sound. I pulled over look for and liquid leakage nothing. I figured im set it might just be an exhaust leak.

So above 2.5 grand I get a hissing sound from about mid body of my car 4 cylinder. It wont make the sound in neutral, and makes alot of hissing in second.

My problem is I can't get it to hiss unless im in gear moving with atleast 2.5G. So I cant use my ears.

I was thinking exhaust leak but it sounds way to high pressured to be a exhaust leak. My buddy said vacuum hose but I know nothing about that system to trouble shoot or even where to find the hoses.

So its a 4 cylinder with no liquid leaks, 93, I take good care of this car..

bigbird · 06-03-2008, 06:26 PM

notice if its running any different?

it could very well be an exhaust leak. theres alot of pressure in an exhaust system especially as it raises up the rpm range.

EverReady · 06-03-2008, 06:29 PM

I noticed a slight preformace drop not much def notice it in second.

But if its an exhaust leak why dont I get the hissing sound in neutral?

bigbird · 06-03-2008, 06:35 PM

same reason i only hear my exhaust leak in reverse

. when the engien is under load then it can change the pressure in exhaust to a degree. but if your loosing performance then that may not be an exhaust leak. can ya get a clip of it?

EverReady · 06-03-2008, 06:53 PM

The best I can get of it. The performance drop might be in my mind though.

bigbird · 06-03-2008, 07:00 PM

yeah that sounds like an exhaust leak, prolly after the cat too. ull want to get under there and have a look to make sure.

EverReady · 06-03-2008, 07:00 PM

okay thanks.

EverReady · 06-03-2008, 07:07 PM

I jacked the back up got under no visible holes or anything. I idled it and I couldn't hear or feel any leaks.

Im at a lose of what to do at this point.

xtremeskier97 · 06-03-2008, 07:11 PM

It's not under load when you are idling. Only other thing you can do is have someone rev it a little..but it still wont be under load.

Almost sounds like you have a turbo..lol

EverReady · 06-03-2008, 07:12 PM

Quote:

Originally Posted by xtremeskier97

It's not under load when you are idling. Only other thing you can do is have someone rev it a little..but it still wont be under load.

Almost sounds like you have a turbo..lol

Yeah I kind though it was cool then I though its probably destroying the life of my car and MPG and HP