Wednesday, September 10, 2014

2003 Jeep Grand Cherokee Fuel Pressure Specs

The fuel injection operation is example for boreal weather starting and fuel consumption.


In Two thousand three the Jeep Grand Cherokee came with a fuel injection process. This process delivered high-pressure fuel to the combustion Hospital ward to inflame a flame, thus causing engine combustion. The fuel injection course is example for bloodless weather starting and fuel consumption.


You should and see the fuel container for any visible leaks or damage. Have someone assist in checking to see if the fuel pump turns on. To do this, connect the negative battery cable, turn the key to the on position and listen for a whirling sound.

Checking the Fuel Pressure


The fuel is delivered from the fuel container, sending the fuel buttoned up a filter and then buttoned up a fuel censure that houses the injectors.


Fuel Injection Inspection


to arrange safety when dealing with the fuel injection system, always facilitate the force by removing the fuel cap. Closest remove the fuel pump relay (this can be identified by looking under the bent box involve) and Eccentric person the engine for a infrequent seconds to assist the impact. Turn the leading off and reinstall the relay. Then disconnect the balky battery cable and trial the fuel lines for any leaks or cracks.


Fuel-Injected System

The fuel injection system uses an injector that houses mini nozzles. Everyone nozzle has a brief orifice, which delivers the fuel at a flying standard of impulse. This is efficient in fuel governance and too controls the vastness of fuel that enters the combustion Hospital ward.



When checking the fuel pressure in the vehicle, you must first relieve the fuel pressure. Once the fuel pressure is relieved, remove the test port cap from the fuel rail and attach a fuel pressure gauge. If the vehicle does not contain a fuel pressure test port, remove the fuel line from the rail and install the gauge using a special adapter. Connect the negative battery terminal, start the engine and read the gauge. Your readings should be 44.2 to 54.2 psi. If you are not receiving sufficient fuel pressure, inspect the fuel lines and the fuel filter for blockage or leaks. If you do not find any issues with the fuel lines or the fuel filter, then replace your fuel pump. If the fuel pressure is higher than the specified pressure, replace the fuel pressure regulator.