ba2sy

iTrader: (1)

I don't think it's the fuel pump since it's in the engine bay. Most fuel pump hissing sound are in the back seat or rear side, right? This one seems pretty bad but I was still able to track my car without my engine going crazy or anything. I just drained the RRRacing Air and Oil Separator 2 hours prior and I just got Air Cup Coilovers 2-3 days ago. I don't know what's wrong.

https://www.youtube.com/watch?v=j3yZ_Cf_EZo&feature=youtu.be

UPDATE:
Thanks guys for your feedbacks. I removed and retighten my AOS: Finger Tight and Wrench Tight. But it's still Vacuum Air Leaking. So, I covered it with tape TEMPORARILY. Sigh~

Air and Oil Separator Air Leak - YouTube

UPDATE 1.2:
Thanks! Sorry for my noobness guys. I really thought it was closed on that position since when I extended it Oil came out. So, I was thinking to put it back in to close it.

JT2MA71

iTrader: (7)

Sounds like an air leak or vacuum of some sort. Does the separator have a petcock?

ba2sy

iTrader: (1)

It has the following valve which I tightened it pretty good unless it'S not good enough... Right now, it's too hot for me to remove and re-tighten... I'll check later...

Davew77

That's a moisture trap. You twist the end to open the valve and let out the built up condensation. It shouldn't require a lot of force to close it. Just finger tight.

I doubt that is your issue.

Mingofish

Faud
it def sounds like vacuum leak.
Its not lines from your cup kit right?

Did you find any loose vacuum hose or a nipple where the hose would attach but is broken off/cracked?
Bad PCV?

gipsonke

I had a hissing sound like that in my daughter's car - drove me nuts!! I COULD NOT find it!

Broke down and took it to my mechanic. He used a stethoscope

http://www.harborfreight.com/mechani...ope-69913.html

And a brush with kid's SOAP BUBBLE solution. Turned out it was the intake manifold. Her's was also throwing a Check Engine light however.

Those can be a pain to find...

Mingofish

An exhaust/manifold leak wouldn't be that loud/dramatic, or at least the ones I've encountered wasn't.
The sound from video was loud and prominent. Still think its vacuum/crank case pressure related.
Does the car run right?
No CEL codes?

ISF001

^^^This^^^sounds like a vacuum leak to me. Also check line attachments, hoses, water
Pump for leaks, and your AC.

ba2sy

iTrader: (1)

Thanks guys for your feedbacks. I removed and retighten my AOS: Finger Tight and Wrench Tight. But it's still Vacuum Air Leaking. So, I covered it with tape TEMPORARILY. Sigh~

Air and Oil Separator Air Leak - YouTube

I use stethoscopes at my job and using one on these will make me go deaf. Lol!

Afte a while there's CEL plus TRAC OFF lights up... I'm like sheeet... Not when I'm about to track...

Air Cup still okay since it's still very new. I asked Platinum.

Oil actually came out when I twisted the end open then close 2 hours prior to heading to track site.

JT2MA71

iTrader: (7)

Your last video shows the petcock fully open. Try turning it the other way. it should be fully extended when closed.

ba2sy

iTrader: (1)

Thanks! Sorry for my noobness guys. I really thought it was closed on that position since when I extended it Oil came out. So, I was thinking to put it back in to close it.

Davew77

Ah, I see! I've seen those used on compressed air lines to trap moisture. I guess it is used in a similar fashion on our cars but to trap oil instead? I've never seen them on cars before now...

So you say that is where the leak is coming from?

JT2MA71

iTrader: (7)

You're welcome! That's what we're all here for