Please help! 255lph fuel pump problems.
 

Car info; 1996 180sx SR20DET. Car is basically stock, just has a full exhaust and intake with Greddy profec boost controller. My stock fuel pump was constantly whining and sounded terrible so I decided to upgrade to a walboro 255lph/hp s13 kit. Install was a breeze and the fuel pump works good.... too good. Now my car is running so rich that it won't idle and it's shooting flames out of the exhaust from all the unburnt fuel. Will an adjustable FPR fix this or do I need to replace injectors? or both? Any advice is appreciated.