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Old 12-04-2012, 02:41 PM   #23
Scooby Specialist
Member#: 245218
Join Date: Apr 2010
Chapter/Region: South East
Location: FL
2013 STI Limited


Originally Posted by mikemike616 View Post
Okay man. I'll try to get it leak tested. Should I be prepared for the need for a retune after the leak is fixed being that it's possible the leak was there when it was tuned? It shows my target boost is almost 18psi which I've never seen even right after the tune.

Thanks so much for all the help. I'll let you know what the outcome is.
It might need to be adjusted, but it will probably be ok since the WGDC's seem to be in the right area to reach your boost target if there was no boost leak. I happen to know that 50-60% WGDC is sufficient enough to hit 18psi with stock turbo, stock TMIC, and Grimmspeed EBCS.

You should go over all of your vacuum lines, TB to IC hose, and BPV hose to see if anything is obvious. If you search the forum here there are a few different threads explaining different ways to perform a boost leak test. I would rule out a boost leak before entertaining other possible causes of your symptoms.

None of this explains how your WGDC was maxed out at 61% on your most recent log, but was hitting in the 80%'s in the log you claim was from right after your tune.....actually come to think about it....does it only not reach boost target as the weather gets colder? It could be that your tuner did not tune the tables that reduce the WGDC's as intake temps get colder. Factory values in these table will cause a big loss in peak boost once the intake temps start dropping below ~60F. Since the EBCS is more sensitive, if those tables were left at factory values it would be pulling out too much WGDC. It could be this instead of a boost leak. Is your tune locked? Can you ask your tuner for a screen shot of the WGDC compensation vs IAT tables?
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