Due to the car engine problem, you may face serious problem in the car engine and the engine P0884 Code is found in the car engine for the test of the car engine. If the problem is started for poor fuel pressure regulator, then it is suggested looking round for a extra part and taking your car to the local mechanic for installation. By a skilled mechanic, it should install a new fuel compression regulator simply. It is always best to have the authorities take care of this job. Believe me, the fuel compression controller is not an easy part to install.