GM 88894176
Fuel Pressure Regulator

A proper replacement of the Fuel Pressure Regulator requires relief of fuel system pressure. The first step includes taking apart both the air cleaner outlet resonator and the engine wiring harness from the front engine retaining clips. The first step should be to disconnect the Fuel Pressure Regulator vacuum line along with cleaning both the regulator and its surrounding area of dirt. Strip away the fuel return pipe retainer while you disconnect its pipe then detach the Fuel Pressure Regulator retainer before extracting the unit. Examine the filter screen on the regulator because any contaminants require replacing the Fuel Pressure Regulator. Begin Fuel Pressure Regulator installation by putting the regulator filter together with a new o-ring on the Fuel Pressure Regulator followed by o-ring lubrication with clean engine oil. Place the Fuel Pressure Regulator into the regulator housing of the Fuel Rail before installing the Fuel Pressure Regulator retainer tight to 8 n.m (71 lb in). The installation process requires installation of the fuel return pipe retainer followed by a tightenance of the return pipe retainer screw to 8 n.m (71 lb in) and the connection of the fuel return pipe and Fuel Pressure Regulator vacuum line. Check for fuel leaks through the ignition cycle by first turning on the battery for two seconds followed by switching it off for ten seconds before repeating the on state to detect any fuel leakage. Reinstall the negative Battery Cable while inspecting for the presence of leaks. Since the last step involves securing the engine wiring harness into retention clips at the engine front while reinstalling the air intake resonator.

The fuel pressure relief procedure should be executed first to relieve fuel system pressure before Fuel Pressure Regulator service begins. Start by removing the air cleaner outlet resonator and disconnecting the engine wiring harness from its clips which attach at the front engine area. Strip away the vacuum hose connected to the Fuel Pressure Regulator before you clean dirt from the regulator along with its adjacent area. The Fuel Pressure Regulator retainer needs removal before the removal process can begin on the Fuel Pressure Regulator itself. Check the filter screen on the regulator for any signs of contamination as a new Fuel Pressure Regulator needs installation if contamination is present. The first step for installation includes placing the regulator filter and replacing the o-ring on the Fuel Pressure Regulator followed by o-ring lubrication with clean engine oil. Place the Fuel Pressure Regulator into the regulator housing on the Fuel Rail before you install the Fuel Pressure Regulator retainer while screwing it to achieve a torque of 8 n.m (71 lb in). The fuel return pipe retainer gets installed next while tightening its screw to 8 n.m (71 lb in). After that, attach both the fuel return pipe and vacuum line of the Fuel Pressure Regulator. Check fuel leaks by turning on the ignition for 2 seconds then waiting ten seconds for off followed by a turn of the ignition to check for fuel loss. Reengage the negative Battery Cable at this time. Reinstall the air intake resonator then place the engine wiring harness inside its retaining clips which are positioned at the front of the engine.

The fuel pressure relief procedure should be followed before starting to service or fix the Fuel Pressure Regulator. First remove the air cleaner outlet resonator along with engine wiring harness clips at the front of the engine. You should start by disconnecting the vacuum line on the Fuel Pressure Regulator before cleaning the regulator in addition to its surrounding area from debris. The procedure starts with disconnecting the fuel return pipe while removing its retainer followed by the Fuel Pressure Regulator retainer for taking out the Fuel Pressure Regulator. Check the filter screen of the regulator for impurities because a dirty screen requires replacement of the Fuel Pressure Regulator. The first step for installation involves putting the regulator filter and a new o-ring on the Fuel Pressure Regulator and lubricating the o-ring with clean engine oil. Put the Fuel Pressure Regulator inside the regulator housing on the Fuel Rail then attach the Fuel Pressure Regulator retainer by screwing it to 8 n.m (71 lb in). You should first install the fuel return pipe retainer while tightening its screw to 8 n.m (71 lb in) before connecting the fuel return pipe and the Fuel Pressure Regulator vacuum line. To inspect leaks you should turn on the ignition for 2 seconds and off for 10 seconds and finally on again to check for fuel leaks after reconnecting the negative Battery Cable. The last step includes placing the front engine wiring harness into retaining clips while also reinstalling the air intake resonator.