Hissing sound from engine bay (video)
Thread Starter
Racer
Joined: Jul 2019
Posts: 366
Likes: 17
Hissing sound from engine bay (video)
Have a loud "hissing" noise coming from engine bay. Sounds almost like pressurized air being let out of something or pushed through something. What do you think it could be?
Here is the video:
https://youtu.be/kgTgcF8dz_o
Here is the video:
https://youtu.be/kgTgcF8dz_o
Last edited by Bstan1009; Mar 27, 2020 at 06:42 PM.
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,628
Likes: 4,074
From: Cape Coral, Florida
Does this occur just after engine start up and continue for about 30-45 seconds ???...may just be your AIR pump running !!...if not maybe a vacuum leak...a little difficult to diagnose from this end !!
Thread Starter
Racer
Joined: Jul 2019
Posts: 366
Likes: 17
that video was after driving about 3-4 miles and driving in city for 10 minutes. How could I diagnose better?
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,628
Likes: 4,074
From: Cape Coral, Florida
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Thread Starter
Racer
Joined: Jul 2019
Posts: 366
Likes: 17
Sprayed all around the intake manifold and vacuum lines today with some MAF cleaner and didn't notice any change in the revs. Did notice that the sound seems like it could possibly be from the fuel line and I can feel the pressure of the fuel moving in somewhat tandem with the sound. Could it possibly just be this? I don't smell gas or see any leaks from this line
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Joined: Mar 2020
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Sprayed all around the intake manifold and vacuum lines today with some MAF cleaner and didn't notice any change in the revs. Did notice that the sound seems like it could possibly be from the fuel line and I can feel the pressure of the fuel moving in somewhat tandem with the sound. Could it possibly just be this? I don't smell gas or see any leaks from this line
Last edited by tommyallen; Mar 29, 2020 at 05:42 PM.
Thread Starter
Racer
Joined: Jul 2019
Posts: 366
Likes: 17
the ac issue is because the ac belt slipped off. Likely due to the fact that some dexcool leaked onto the ac pulley and belt a little belt. AC issue solved. Coolant levels not low and I have identified source of the leak. Hissing sound TBD. MAF test is pretty basic stuff to help identify vacuum leak albeit not the most effective. Posts not really all over the place just facts that may connect two symptoms that another person has experienced that could lead to a good recommendation. Pretty simple stuff really. I have 2 likely ideas as to source of hiss now and should have it fixed by tomorrow. I'll update the results so that anyone going forward may benefit.
