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Old 01-03-2020, 05:27 PM   #1
ebrosz
Scooby Newbie
 
Member#: 510357
Join Date: Jan 2020
Chapter/Region: RMIC
Location: Colorado
Vehicle:
2002 Wrx Wagon
Sedona Red

Default Boost oscillation

I'm sure this has been covered but most of the solutions I've found weren't applicable to my situation. So I've owned my 2002 wrx wagon for six or so months now. In the last 4 months it has been getting boost oscillations in 3rd-5th gear at anything over 3500 rpms. And has gotten worse in the last month or so. Here's a list of mods
STI VF39 turbo
STI blue injectors
New intake manifold gaskets
STI intercooler
New hoses throughout (silicone)
Newer 04 wrx transmission
Grimspeed headers
Grimspeed y-pipe
STI up pipe
Hks downpipe
Apexi cat back
New intake manifold gasket
Gfb respons hybrid bov
Cobb 3 port EBCS
Aeromotive 340lph
Heat wrapped SPT intake

I've smoke tested and sealed a couple leaks and inspected vac lines. I have a hunch it might be a boost leak but can't find anything obvious. Any help would be greatly appreciated as I've tried a ton of things to no avail
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