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Old 08-24-2014, 11:34 PM   #1
NOCOBugeye96
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Default Low boost for 2002 WRX Stage 2.

Hello guys this is my first post here as I usually just look up my issues and find wonderful answers through previously posted topics. I have finally encountered one that I cannot find and or figure out. I drive a Stage 2 '02 WRX. I am having issues with my boost readings. I am not hitting target boost or really even close to it. Just to give you some back ground info I am reading this boost off of my Cobb accessport and have everything stock except for catless uppipe downpipe and cat back exhaust. I am running the Stage 2 OTS map for 91 octane. I can only reach max of 11.9 psi boost. I have checked the bcs and it clicks when I hook it up to battery and I can blow air through it. I have cleaned my vac line number 1 and the pill is in it. I had a jacked up inlet hose so I just replaced it with a mishimoto silicone one. Adjusted my wastegate two turns and still only 11.9 boost. I went to the HWG map and still no luck. I made my own boost leak tester from another forum and couldn't exactly get it to work as I am a noob when it comes to most things. I checked most lines and no boost leaks. Please help and let me know what else I can do.


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Old 08-24-2014, 11:42 PM   #2
NOCOBugeye96
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I forgot to mention that I have also removed the vac line (just removed didn't plug) from the wastegate and tried to build boost but only got to 14.2. Figured I'd toss that out too. Oh and no CEL's.


02 Bugeye Stage 2
First Car
166k and Still Strong
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Old 08-25-2014, 04:38 AM   #3
Brother EddieJ.
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Chapter/Region: MAIC
Location: frederick, md
Vehicle:
2004 wrx
6speed/ 330whp/ 300wtq

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Sounds like turbo is dying or you have a major leak
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Old 08-25-2014, 08:02 AM   #4
quazimoto
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Quote:
Originally Posted by Brother EddieJ. View Post
Sounds like turbo is dying or you have a major leak
Yup. Not sure how a search for low boost didn't turn up a million suggestions for a boost leak test. If it passes a boost leak test I would be looking for a pretty good size preturbo exhaust leak. You have the AP so why no datalogs?
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Old 08-25-2014, 10:41 AM   #5
Crazyced
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2004 Impreza WRX
World Rally Blue

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It's also possible that your WGA might be getting weak and the back pressure is pushing it open (if everything else checks out). Although I don't know how common that is on this platform.
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Old 08-25-2014, 01:12 PM   #6
NOCOBugeye96
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Should I check my uppipe and headers for exhaust leaks? And I recently got the ap and have not fooled around with data logs yet so I will do some research and put some up.


02 Bugeye Stage 2
First Car
166k and Still Strong
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Old 08-25-2014, 01:33 PM   #7
NOCOBugeye96
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Oh and what should I log? Boost target and boost?


02 Bugeye Stage 2
First Car
166k and Still Strong
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