Engine Modifications
Hello everyone,
I’m new here btw!
I’ve got a 2009 JDM WRX Hatch
EJ20X
ProTune
GFB Hybrid BOV
otherwise, it’s fully stock.
When the BOV is set to 100% recirculating, the exhaust backfires in the higher rpms.
My questions are:
is this safe?
What exactly causes this?
Any help will be...