P0252 Injection Pump Fuel Metering Control "A" Range/Performance (Cam/Rotor/Injector)----- getting this check engine light code when i turn my quadzilla up im hitting 43 pounds of boost now randomely and the motor is popping and spuddering is the turbo going or the injection pump any help appreciated!

 

Judging by that code I'd say mechanical pump failure... what does your fp do when it starts acting up?