Weird noises from the engine bay. HELP!!!!!

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Jan 1, 2008 | 01:06 PM

nightman06

Thread Starter

Racer

Joined: Nov 2005

Posts: 410

Likes: 1

From: Amherst NH

Weird noises from the engine bay. HELP!!!!!

I was driving home last night on the highway and noticed a hissing sound start coming from the engine bay. I could only hear it faintly on the highway but when I pulled off onto a small street it became more noticable. I woke up today and poked my head under the hood to try and hear where its coming from and it seems to be from the intake manifold. Either directly from it or on the firewall side of it. Any ideas? Again it sounds just like if you were to squeeze a bike pump, except it isnt a consistent flow of air, its a little choppy. My vents wont change positions as well, I mean, the air doesnt direct through a specific vent and when I change the mode nothing happens. I have no idea.

Last edited by nightman06; Jan 1, 2008 at 01:33 PM.

Jan 1, 2008 | 01:51 PM

Slick Rick

Pro

Joined: Apr 2007

Posts: 650

Likes: 4

From: Pittsburg Ca.

Sounds like your Hvac vacuam hose broke or fell off. Its a pain to fix. Probably have to take intake off unless you have real small hands. Thats the hissing your hearing and the reason your vents arnt working.........

Jan 1, 2008 | 02:48 PM

1FUNC5

Le Mans Master

Joined: Oct 2002

Posts: 8,008

Likes: 49

From: Hoover, AL NCM Life Member #2438

check your battery.....if it is leaking they might have corroded the vaccum lines that operate the door for the air vents.......these lines are right under the battery.

Jan 1, 2008 | 02:52 PM

vincentjames501

Burning Brakes

Joined: Aug 2007

Posts: 866

Likes: 0

From: Madison Wisconsin

Quote:

Originally Posted by Slick Rick

Check that first. If it is, may be a good idea to upgrade to a FAST

Jan 1, 2008 | 06:18 PM

nightman06

Thread Starter

Racer

Joined: Nov 2005

Posts: 410

Likes: 1

From: Amherst NH

can i drive it for today until the shop opens up tomorrow?? I am still showing good oil pressure.....

Jan 1, 2008 | 06:34 PM

Corvette-Chris

Le Mans Master

Joined: Jul 2005

Posts: 7,121

Likes: 3

From: Shreveport/Bossier Louisiana

St. Jude Donor '08

Probably just a vaccume leak like stated above. Nothing wrong with driving it to the shop

Jan 2, 2008 | 04:18 AM

bisrael

Instructor

Joined: Dec 2004

Posts: 113

Likes: 0

From: Fullerton CA

If it's high mileage, could just be the manifold gasket isn't sealing so great anymore. Or it could be more ominous:

Jan 2, 2008 | 02:41 PM

nightman06

Thread Starter

Racer

Joined: Nov 2005

Posts: 410

Likes: 1

From: Amherst NH

haha nice. Well its got 103K on it. This will be the first unscheduled maintenance trip to the shop. Im hoping this isnt the start of many frequent trips.....