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My ms6 is having a fuel rail pressure loss past 5,000rpm. A little background of the car: built engine with around 600 miles. 6262 turbo. return style fuel system with aeromotive fuel pressure regulator, base pressure set at 40psi with rising rate, Walbro 525lph ITFP with new stainless steel...

hello all, i am in the process of installing new engine in my 07 mazdaspeed 6. currently having an issue with no voltage to injectors. i traced it down to not having ground at the injector relay in the engine bay. i ended up running a ground wire from the negative terminal on the battery to the...