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Old 06-26-2020, 09:12 PM   #1
vorlon333
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Default Boost issue 2014 wrx

Sorry if this is the wrong place for this question, It's been a while since I've posted.

I just got a, new to me, 2014 wrx hatch (first time back in a wrx in 10 years) and installed cobb stage 1 today, according to the accessport I'm around -10 psi at idle, but the the highest I can hit under load is about 7.5 psi and I believe target is 17 for stage 1 with the 93 octane map.

So my question is this, where should I check for boost leaks, I've already checked the Cobb CAI I installed today and its good, but I can't find a good diagram that calls out all the other vacuum hoses and connections that I should be checking. I know there's ways to do a full test, but I just want to visually inspect everything before I get into that whole process and see if its just something loose that I just might not be seeing because I don't know everywhere I need to be looking.
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Old 06-26-2020, 09:41 PM   #2
supermarkus
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Is your restrictor pill in place at the turbo housing hose?
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Old 06-26-2020, 11:46 PM   #3
Stretch18
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Default Boost issue 2014 wrx

CAI is preturbo, so not under boost.

You should check the intercooler clamps and throttle body hose. The gasket between the turbo and intercooler is also worth just replacing for $6 or whatever, while youíre taking things apart. Also check the MAP tubing (running off the front of the intake manifold) to make sure itís not cracked. Another $2 worth of new tubing from autozone will save you some hassle either way.

If thatís not it, then digging deeper is a huge PITA. At that point bring it to a shop and have them smoke test everything, so you donít need to dissect down to the intake manifold...
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Old 06-27-2020, 12:31 AM   #4
vorlon333
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Not sure how I missed this earlier, but the suggestion with the restrictor pill told me where to look. Thank you. Now just to try to find a replacement for this part.

Along those lines any good alternatives to samco ancillary hoses, I was looking at the mishimoto but they say they're for 2015+ not 2014, but that price point is so much better than the samco.
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Old 06-27-2020, 04:53 PM   #5
vorlon333
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So I replaced the broken line with some 5/32 vacuum hose and made sure the restrictor pill was in place....and now the best boost I'm hitting is 6.9 psi, not sure how it got worse
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Old 06-27-2020, 04:55 PM   #6
supermarkus
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Check the function of your boost solenoid. Make sure it is actuating and plumbed correctly.
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Old 06-27-2020, 05:01 PM   #7
vorlon333
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Quote:
Originally Posted by supermarkus View Post
Check the function of your boost solenoid. Make sure it is actuating and plumbed correctly.
This may sound dumb but how do I do that?
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Old 06-27-2020, 05:04 PM   #8
supermarkus
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Trace that central boost line back to the solenoid and make sure it is plugged into the appropriate port. You'll. Need a diagram, I can't remember which it is off the top of my head. Check the solenoid to make sure it is plugged in and receiving power. Then make sure it triggers correctly. It will. Click if voltage is applied. If it doesn't click/actuate it has failed in the open position and is limiting you to 7 psi
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Old 06-27-2020, 05:14 PM   #9
vorlon333
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What's the safest way to apply voltage to test that?

I do really appreciate all the help, I knew I'd be doing work, it's why I bought the car, just was hoping to do more fun stuff lol
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Old 06-27-2020, 05:36 PM   #10
vorlon333
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Couple of other quick questions-
Is it safe to drive with this issue, as in not causing long term harm, just obviously under producing on boost

Second I think I found the correct part if I have to order it, I've included pictures

And I also included some pics of what I believe is the right part in my car and how it's currently setup. If it's not the right part then I'm way off....
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