Hey, so I've had my Legacy for about 2 and a half months now, imported from Japan. About a month and a half after owning it I started experiencing a boost issue, every now and then it would slightly hesitate if I got on boost in primary and shifted into the next gear before VoD. After the shift boost would hover at about 4psi for about 2-4 seconds (feels like forever) if I applied a fair amount of throttle or full throttle. After about 2700rpm it would start boosting properly and jump to 13 pretty quickly until either VoD or I shifted.
This problem now happens all the time if I'm applying enough throttle to get on boost in first gear (or 2...3) but only after I shift into the next gear is when I experience that slight lag.
I have also noticed that the exhaust note changes and becomes a little bit deeper and less of a burble after the shift. Leading me to believe it could be something to do with the waste gate or exhaust control. Not familiar enough with these cars to go any further than that.
If I boost into secondary it behaves just fine with no extra lag. Also if I boost in first gear, shift and then gradually apply throttle in the next gear or apply full then back off a bit it boosts fine. This issue is only present if I apply full throttle after a shift.
For mods I have done the hose 10, placing a 0.8mm restrictor pill into hose 1 to slow IACV opening speed although I didn't notice such a difference as stated here http://clubsub.org.nz/forum/showthread.php?40911-Inside-the-BBOD&p=526939&viewfull=1#post526939
Is there anyone that would know what could be causing this issue? Thanks!
