2012 Mazdaspeed3 only upgrades are cold air. Also have an Access port not currently tuned though.
Hi all, been having issues with rough idle for about 4 months now. I've already done just about everything I've read and found on the issue. Cleaned TB, changed plugs, coils, sea foamed, checked MAF, etc. Did a boost leak test today through the upper hose of my intake. Air just immediately comes right out of the tiny BPV hole (bypass valve) (pretty sure that's what that means). I've researched all day and can't find any answers. I messed around with my access port and looked at fuel trims at idle and ac off. Short term was speratic going to 14% then 0% then +5% then 0% then -6% and back and forth. Long term was around 10 the whole time. So literally any help other than the basics is greatly appreciated.