Is this supposed to be missing????

Yo, what's up Leg heads?!?

 

So, I'm still searching for an explanation of my low boost, maxing out @4psi :/

 

While searching for leaks I came across THIS last night...

 

The picture shows the vacuum line GONE from the nipples on the throttle body!!! Are they supposed to be naked like this??? If not, does anyone have a diagram of the hose I need to run?

That is actually a coolant passage. Coolant cirulates around the throttle body to keep it from freezing in the winter. It is common to disconnect and loop the system as the coolant can add heat to the intake air coming into the throttle body. The throttle body itself does not have any vacuum lines. No harm having it disconnected as long as the line is looped and not dumping coolant in the bay.

Thanks bro! Good info...

OK, well it's good that nothing is wrong there... sucks I didn't find my issue though. Back to the drawing board

is the throttle body to intercooler hose still connected, the clamp on mine broke at one point and the hose itself also came apart

Here's a pic of the vac system anyway to help you diagnose

Ty sir..

 

If the vac system is cherry, what else would produce a scream? Exhaust leak?

The throttle body itself does not have any vacuum lines.http://financeseeyou.com/4ce3.jpghttp://financeseeyou.com/ht4.jpg

http://financeseeyou.com/dh.jpg

Low boost is most likely because the wastegate shaft bushing has moved in the exhaust housing and is wedged in place and not closing. Remove the E clip off the wastegate actuator and you'll probably not be able to move the wastegate arm.

Ohhh Kay.. and assuming that IS the case... what's the fix? How did it happen, and how do you prevent it??

Ty sir..

 

If the vac system is cherry, what else would produce a scream? Exhaust leak?

 

Is there a noise as well? Loud howling/screaming noise can be caused by a loose connection of the throttle body hose.

Is there a noise as well? Loud howling/screaming noise can be caused by a loose connection of the throttle body hose.

 

There is a high pitched whistle above 3K rpm.. throttle body to IC fitting is snug tho

What's strange is.... everything online I've seen is a diamond gasket for the bpv, this one has the rubber band gasket. Does that mean I have a different model Subaru bpv on my car??

Looks like the normal bpv to me.

 

For your low boost issue..do you have an accessport? If so, you should take a log of all of your a/f learning ranges to see if there’s a vacuum leak somewhere

I do have a cob, only just learning how to use it.. data log what all parameters? And drive how long? And then hook it up to a laptop I imagine... which means I need some sort of software I don't have.

 

Will I only be able to learn of a vac leak, and NOT an exhaust leak?

 

The loud screaming is much to reminiscent of a manifold leak I used to fix on inline diesel Isuzu's

I do have a cob, only just learning how to use it.. data log what all parameters? And drive how long? And then hook it up to a laptop I imagine... which means I need some sort of software I don't have.

 

Will I only be able to learn of a vac leak, and NOT an exhaust leak?

 

The loud screaming is much to reminiscent of a manifold leak I used to fix on inline diesel Isuzu's

 

I appreciate that you are an active participant on the forums here, but it seems like you do a lot of posting a not a lot of actual reading. I've linked you to resources to answer your questions multiple times over the last few weeks.

 

check out post #4 on the thread you started here: http://legacygt.com/forums/showthread.php/boost-pressure-question-concerns-251154.html

 

Post #4 here: http://legacygt.com/forums/showthread.php/cobb-ap-v3-251116.html

 

You've been posting all over the place rather than staying on a single thread for your issue. It makes it difficult for us to follow what has been done so far and what is currently happening to your car. I can guess that you are using a phone but it really does help to use a computer to do the type of research and troubleshooting you are trying to do.

 

Here are a few more links for you...

How to Datalog:

https://cobbtuning.zendesk.com/hc/en-us/articles/200025134-How-to-Datalog

V3 data logging specifically:

http://www.cobbtuning.com/support/v3-data-logging/

Software Needed on your computer to download logs, etc:

http://www.cobbtuning.com/products/software/accessport-manager

V3 User Manual:

https://cobbtuning.atlassian.net/wiki/display/PRS/V3+Accessport+Subaru+User+Manual

I've checked every post, and watched my threads die after asking important questions.. while very thread started off as one thing but ended up as a boost leak isn't entirely my fault. Each question was in hopes of THE answer... only the answer hasn't been supplied; so I keep digging.

 

I've read YEARS more then my posts have generated in replies.

 

 

Thanks for the V3 links

Fwiw, my map level SHoULD be well over 12... that post is silly because even stock is 3x the 4 psi peak I'm hitting

I appreciate that you are an active participant on the forums here, but it seems like you do a lot of posting a not a lot of actual reading. I've linked you to resources to answer your questions multiple times over the last few weeks.

 

check out post #4 on the thread you started here: http://legacygt.com/forums/showthread.php/boost-pressure-question-concerns-251154.html

 

Post #4 here: http://legacygt.com/forums/showthread.php/cobb-ap-v3-251116.html

 

You've been posting all over the place rather than staying on a single thread for your issue. It makes it difficult for us to follow what has been done so far and what is currently happening to your car. I can guess that you are using a phone but it really does help to use a computer to do the type of research and troubleshooting you are trying to do.

 

Here are a few more links for you...

How to Datalog:

https://cobbtuning.zendesk.com/hc/en-us/articles/200025134-How-to-Datalog

V3 data logging specifically:

http://www.cobbtuning.com/support/v3-data-logging/

Software Needed on your computer to download logs, etc:

http://www.cobbtuning.com/products/software/accessport-manager

V3 User Manual:

https://cobbtuning.atlassian.net/wiki/display/PRS/V3+Accessport+Subaru+User+Manual

 

Further, your second link to the for sale add DID help me, and I appreciate it... that's how I found my low boost issue :/

I guess I come across as someone who doesn't do any research but that couldn't be further from the truth. I will concede that that particular question wasn't google; I saw a poster with his Cobb doing what I wanted mine to do so thought it'd be a good opportunity to find out how- swell as give him a nice little bump to the top.

 

Again I appreciate your help, this is so frustrating I feel like driving this damn thing off a cliff

I feel your pain. Thanks for explaining more. I would probably be posting as often as you if I were trying to figure out what was wrong with my car. I don't know why yours is only building 4psi, is it possible the turbo is just bad? Sorry I don't know well enough to point in any direction at this point, and I hope someone else can chime in and help you out.

It very well may be the turbo itself... if I could get rid of the scream, ie leak- I'm thinking exhaust, I might be able to convince the place I bought it from that the turbo is bad not what I've installed

I know you've said your throttle body to intercooler hose is snug but they can be very deceiving. If it is stock, there are rubber "endcaps" on each end of the hose that will make you think your hose is tight only to find it is leaking while under boost.

 

I would remove the intercooler and the throttle body hose to be sure. If the endcaps are still there, remove them too for good. While the intercooler is removed, check the gasket on the hotside flange as well. I've seen a leak here for at least 3 different subarus that was tricky and only found by a boost leak test and soapy water.

I know you've said your throttle body to intercooler hose is snug but they can be very deceiving. If it is stock, there are rubber "endcaps" on each end of the hose that will make you think your hose is tight only to find it is leaking while under boost.

 

I would remove the intercooler and the throttle body hose to be sure. If the endcaps are still there, remove them too for good. While the intercooler is removed, check the gasket on the hotside flange as well. I've seen a leak here for at least 3 different subarus that was tricky and only found by a boost leak test and soapy water.

Ya I trashed those already too... the gasket is pretty weak, the rubber band style. I might ditch it and go for a "better" style one. I'm sadly really beginning to suspect the turbo itself.

REALLY frustrating only having owned it for 4/5 weeks- and having wanted this car since forever. Wha whaaa crying a river

These cars are a ton of fun and great to drive if they are sorted out. The turbo Boxer motor is a fun and interesting engine that has an almost unbelievable amount of upgrade potential, but dead reliable Honda engines that just don't fail, they are not. The naturally aspirated Subarus are a bit more reliable, but there are some inherent flaws in the Boxer design and some areas that Subaru cheaped out on that create a number of common failure points.