Year/Make/Model: 2012 Mazdaspeed 3
Mileage: 120,000
Location/Alitutude: Dayton, OH (sea level)
Concern: Can't build fuel pressure past 500 psi while driving
DTC's: P0301, P0302, P0303, P0304
Modifications: CS intake & TIP, Mishimoto FMIC, CPE DP, MAC EBCS, CS HPFP internals & injector seals...