Boost leak

[arrivalblue]

Noticed when opened my hood tonight looking for possible boost leak heard air leaking or vacuuming from this hose what is it and would it cause intermittent issues or boost to be all over? Right at the 90 fitting I hear air.

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[glock-coma]

That hose connects to the intake manifold near the throttle body.
The grey piece of plastic in the hose to the right is the check valve for the brake booster. That’s where you probably hear the vacuum noise, it’s normal.
Common boost leak areas are circled in red. Recommend putting clamps or zip ties on them.

 

[glock-coma]

 

[arrivalblue]

Ok thanks! Yea I thought so but wasn’t for sure! I’ll check those ones later today


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[ZSHO]

That vacuum line looks as if it was changed recently!! Check the brake fluid reservoir to make sure its on the Full line! Master Cylinder Reservoir cap is on wrong.  Z 

 

[arrivalblue]

In original picture I’ve had the car since 33k and it’s never been off to my knowledge ha. It’s at 83k now in less then 2 years


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[ZSHO]

In original picture I’ve had the car since 33k and it’s never been off to my knowledge ha. It’s at 83k now in less then 2 years


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How's the brake fluid level! Just trying to help ya out.  Z 

 

[arrivalblue]

It all appears ok. Just seems strange to hear air vacuum like that lol. Brakes were done right before I bought it. Maybe was put on wrong then?


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[ZSHO]

I would monitor it and if it gets louder or the brake feel is not good I  change the hose for a peace of mind especially @ that price point.  Z

Connector Hose - Ford (AA5Z-9E455-A)  $3.82

https://parts.levittownfordparts.com/oem-parts/ford-connector-hose-aa5z9e455a/?c=Zz1lbWlzc2lvbi1zeXN0ZW0mcz1lbWlzc2lvbi1jb21wb25lbnRzJmk9S0QwOTIxNzUmcj0xNiZhPWxpbmNvbG4mbz1ta3MmeT0yMDEzJnQ9ZWNvYm9vc3QmZT0zLTVsLXY2LWdhcw%3D%3D

 

[arrivalblue]

I saw a thread you had the same issue? Did you have any boost leak or car not building full boost ?


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[ZSHO]

I saw a thread you had the same issue? Did you have any boost leak or car not building full boost ?


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That line has nothing to do with boost! It only works on vacuum related to your braking system IIRC!
I don't recall the thread! Do you have a specific link! TIA.  Z

 

[arrivalblue]

Oh ok I thought I read it had some pressure when under boost. And the gray double circle piece I assume is a check valve stops it from going back into the system. Idk lol. This was one I was referring to if it works.

Vacuum Hose Connector!!
https://r.tapatalk.com/shareLink?share_fid=56487&share_tid=8429&url=http%3A%2F%2Fwww%2Eecoboostperformanceforum%2Ecom%2Findex%2Ephp%3Ftopic%3D8429&share_type=t


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[ZSHO]

The good ole check valve!  Z

https://www.ecoboostperformanceforum.com/index.php/topic,8429.msg127298.html#msg127298

 

[arrivalblue]

Was it same issue? Cause anything funny?


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[ZSHO]

Its from my understanding that the hissing sound is normal but only to a certain extent or volume......

It could be Two issues causing the higher than normal hissing sound!

1)Rubber vacuum hose leaking.

2)Grey plastic/vinyl check valves from Vacuum Tube, Manifold - Vacuum Supply.

In my case it was indeed the black rubber vacuum hose which was leaking due to heat exposure without any performance issues IIRC. Best of luck.  Z

https://parts.levittownfordparts.com/oem-parts/ford-connector-hose-aa5z9e455a/?c=Zz1lbWlzc2lvbi1zeXN0ZW0mcz1lbWlzc2lvbi1jb21wb25lbnRzJmk9S0QwOTIxNzUmcj0xNiZhPWxpbmNvbG4mbz1ta3MmeT0yMDEzJnQ9ZWNvYm9vc3QmZT0zLTVsLXY2LWdhcw%3D%3D

https://parts.levittownfordparts.com/oem-parts/ford-vacuum-hose-dg1z9c490b/?c=Zz1ib2R5JnM9bWFzdGVyLWN5bGluZGVyLWNvbXBvbmVudHMtb24tZGFzaC1wYW5lbCZpPUtEMDkyOTE1JnI9MTMmYT1saW5jb2xuJm89bWtzJnk9MjAxMyZ0PWVjb2Jvb3N0JmU9My01bC12Ni1nYXM%3D

 

[arrivalblue]

Ok cool I’ll have to hunt it down some more. Seems like boost is normal until car warms up more. Then won’t go past 4psi


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[SHOdded]

Wastegate seals (orange ones)
Turbo piping - clamps
Turbo piping - cracks, especially on the underside which is not seen but discovered by "feeling" it out, has accumulation of oil/grease/dirt if so
Unsecured control hoses atop the intake manifold as referred to earlier
Dirty MAP sensor(s) / connector(s)

 

[arrivalblue]

Gotta get this sorted ASAP. Thought maybe turbo was going bad. Trying out a new tuning device soon want it all right first. Is this the benefit of going to hard hot pipes? Less chance of this? Lol


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[SHOdded]

At least it will get rid of boost leaks from those pipes, yes.

 

[arrivalblue]

Right on. The hunt is on for a leak. Must expand when gets hot causing lost boost?


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