krayzedpinoy
Member
- :
- 2004 Mazdaspeed MX-5 & 2011 Mazda 2
larger fuel injectors might help 

i wouldn't get 440s unless you have something to tune it with. msps run rich enough on the stock ecu. i have my stock injectors if you wanna swap them to see if that's the problem. i have a boost leak tester we can use to make sure your plastic piping isnt cracked too
hope you figure it out soon. since the vacuum is normal, maybe try getting the wastegate changed
i wouldn't get 440s unless you have something to tune it with. msps run rich enough on the stock ecu. i have my stock injectors if you wanna swap them to see if that's the problem. i have a boost leak tester we can use to make sure your plastic piping isnt cracked too