Leaking fuel injectors can cause Oil ThinningĪt engine shutdown the fuel pressure should maintain operating pressure or just below that for a substantial period of time.
Any external fuel injector leaks such as a cracked fuel injector body or bad fuel injector O-rings can cause an engine fire at any given time. This operating pressure is maintained throughout the driving or running period. When the engine is started for the first time at any given day the fuel rail which is part of the fuel injection system is pressurized by the fuel pump, under command of the engine management system to the operating pressure of the fuel injection system. Manifold fuel injection systems on average operate at about 45 Psi (Pounds per square inch) Side feed and top feed fuel injectors are used in manifold fuel injection systems.
The basic manifold fuel injection system consist of a fuel pump, fuel pressure regulator, fuel lines, fuel filter, fuel rail, fuel injectors and the engine control unit or engine management system. There are two types of fuel injection systems, manifold fuel injection and direct fuel injection systems. To understand why leaking fuel injectors are troublesome and dangerous some understanding of the fuel injection system is required. It is suggested that you have your leaking fuel injector sent to Injector RX for testing and cleaning. The average DIY fuel injector cleaning project and most automotive repair shops does not have the proper diagnostic equipment or the ability to test leaking injectors or clean them properly.
Top and bottom fuel injector O-rings (Repairable – Replace O-rings).