GM 17113622
Fuel Pressure Regulator

Service and repair of the Fuel Pressure Regulator require the user to first relieve fuel system pressure. First disconnect the vacuum line from the Fuel Pressure Regulator then remove its retaining screw. Use a towel placed underneath before lifting and twisting the regulator at the Fuel Rail to separate it from the Fuel Pressure Regulator system. Separate the bracket-retainer assembly from the rail before you disconnect the Fuel Pressure Regulator from engine fuel return pipe to discard two parts including the inlet o-ring. The filter screen must be checked for contamination before changing the Fuel Pressure Regulator. Check the fuel return line before tightening the regulator attaching screw because rotating movements might damage the retainer and spacer bracket thus causing a fuel leak at the inlet. The Fuel Pressure Regulator should not undergo testing or cleaning with compressed air because this practice will probably result in damage. Use gasoline to clean the filter screen but avoid placing the regulator inside any solvent bath. Clean engine oil serves to lubricate the new o-ring at the regulator inlet before installing it to this section. Fix the fuel return pipe onto the regulator before mounting the new retainer along with spacer bracket within the slot located on the Fuel Rail. Mount the pressure regulator onto the Fuel Rail while torquing the engine fuel return pipe nut at 17 n.m (13 lb ft). The Fuel Pressure Regulator vacuum line needs attachment followed by tightening its screw to 8.5 n.m (76 lb in). Check that the retainer connects securely with the slots inside the Fuel Rail as seen when pulling on the regulator. To check for fuel leaks turn the ignition on for 2 seconds then off for 10 seconds followed by turning the ignition on for another inspection of leaks.

Before servicing the Fuel Pressure Regulator a fuel system pressure relief method should be performed first. The Fuel Pressure Regulator requires service by disconnecting the vacuum line before removing its retaining screw. A shop towel should be used to contain fuel droplets when you twist the Fuel Pressure Regulator away from the Fuel Rail to detach it. Please remove the retainer as well as the spacer bracket from the rail before extracting the Fuel Pressure Regulator from the engine fuel return pipe. Thoroughly dispose of the Fuel Pressure Regulator inlet o-ring together with the fuel return pipe o-ring. Check the filter screen for contamination because contaminated parts require replacement of the Fuel Pressure Regulator. The Fuel Pressure Regulator filter screen requires cleaning with gasoline when necessary however complete immersions in solvent baths or usage of compressed air for testing or cleaning will damage the regulator. Apply clean engine oil to the new pressure regulator inlet o-ring before installing it onto the regulator inlet and following this up by lubricating and installing the new fuel return pipe o-ring. Secure the regulator attaching screw before connecting the fuel return line because unscrewed movement could vandalize the retainer and spacer bracket leading to fuel leakage at the regulator inlet. Insert the new retainer and spacer bracket into the Fuel Rail slot before connecting the pressure regulator unit to the rail and torquing engine fuel return pipe to 17 n.m (13 lb ft). Use the Fuel Pressure Regulator vacuum line before threading and securing the regulator attaching screw at 8.5 n.m of torque (75 lb in). Use a hand to check that the retainer together with spacer bracket securely rests within the Fuel Rail slots before pulling on the regulator for proper installation verification. Finish the procedure by first connecting the negative Battery Cable then verify the fuel system for leaks by activating the ignition switch for two seconds before switching it off for ten seconds and finally activating it again for leak inspection.

The first step to replace a Fuel Pressure Regulator requires removing fuel system pressure. First disconnect the vacuum line from the Fuel Pressure Regulator before you remove the fuel return pipe and its securing screw. Twisting the regulator as you lift it away from the Fuel Rail is possible by using a shop towel to capture any fuel that might spill. The maintenance process requires discarding of retainer components and spacer bracket along with removing inlet and return pipe o-rings. Check the filter screen for contamination and replace the Fuel Pressure Regulator in case of its contamination. Put clean engine oil on the Fuel Pressure Regulator o-rings before placing them onto the regulator assembly. Use compressed air for tests or cleaning operations on the regulator since submersion of this component in solvent baths is also prohibited. Tighten the screw only after connecting the fuel return pipe to the regulator since this prevents retainer and spacer bracket damage. Use the new retainer and spacer bracket to replace the ones on the Fuel Rail before securing the Fuel Pressure Regulator and its screw. Secure the Fuel Pressure Regulator screw to 8.5 n.m (75 lb in) along with tightening the engine fuel return pipe nut to 17 n.m (13 lb ft). Vin initiates the processes of vacuum line assembly followed by retainer and spacer bracket engagement check and then negative Battery Cable connection. Complete the inspection process by turning the ignition two times and surveying for fuel leakages.

The first step to replace the Fuel Pressure Regulator requires the removal of fuel system pressure. You should first disconnect the Fuel Pressure Regulator vacuum line and then remove its retaining screw. A shop towel should be used to contain any spilled fuel after you lift and twist the Fuel Pressure Regulator in order to detach it from the Fuel Rail. Take away the retainer and spacer bracket followed by removal of the Fuel Pressure Regulator from the engine fuel return pipe where you need to discard the inlet o-ring. Connect the fuel return line before installation to stop regulator rotation that may hurt the retainer and spacer bracket and create a fuel leak. Compressed air should not be used for cleaning or testing the Fuel Pressure Regulator since it poses the risk of causing damage. The filter screen requires cleaning with gasoline only but keep the regulator out of all solvent baths. The filter screen requires examination for pollutants; if contamination is present, you need to install a new Fuel Pressure Regulator. The new inlet o-ring needs engine oil lubrication before its installation onto the regulator inlet position. The fuel return pipe needs to be connected to the regulator before you put the new retainer alongside spacer bracket into the Fuel Rail slot. You should mount the pressure regulator to the Fuel Rail while making sure the engine fuel return pipe nut reaches a torque of 17 n.m (13 lb ft). Fasten the vacuum line while using an attaching screw which needs tightening up to 8.5 n.m (76 lb in). A proper seat of the regulator can be confirmed by applying tension to both the retainer and spacer bracket until it fixes into the Fuel Rail slots. To check for fuel leaks turn the ignition on for 2 seconds, wait 10 seconds with off position and then turn the ignition on to inspect for any leaking fuel.

Prior to servicing the Fuel Pressure Regulator you must drain fuel system pressure from the system. Detach the Fuel Pressure Regulator vacuum line then undo its retaining screw. A shop towel should catch flowing fuel during the Fuel Pressure Regulator's removal from the Fuel Rail through lifting and twisting procedures. Detach the retainer with spacer bracket while discarding both elements before removing the Fuel Pressure Regulator from its position on the engine fuel return pipe. Afterward discard the inlet o-ring. A fuel return line connection should take place first to stop regulator rotation that could harm the retainer and spacer bracket while also preventing fuel leakage. Testing or cleaning the Fuel Pressure Regulator requires avoidance of compressed air since damage can occur whereas cleaning the filter screen with gasoline should replace immersion in solvent baths. A check of the filter screen will determine if contamination exists so replace the Fuel Pressure Regulator when contamination is detected. The new inlet o-ring requires engine oil lubrication before its installation onto the regulator inlet. Place the fuel return pipe on the regulator before you fit the new spacer bracket and retainer to their designated slot on the Fuel Rail. Mount the pressure regulator onto the Fuel Rail before tightening its engine fuel return pipe nut to 17 nm (13 lb ft). The Fuel Pressure Regulator vacuum line must now be reconnected followed by installing and tightening an attaching screw to 8.5 nm (76 lb in). To verify proper seating of the retainer and spacer bracket check the regulator when pulling it towards the slots inside the Fuel Rail. Finish the procedure by reinstalling the fuel filler cap then connect the negative Battery Cable. The inspection of fuel system occurs by following an ignition switch sequence of 2-second on position then 10-second off position followed by another 2-second on position while checking for any fuel leaks.

The first step before servicing or repairing the Fuel Pressure Regulator includes draining the fuel system pressure. The vacuum line of the Fuel Pressure Regulator must be disconnected followed by removal of the retaining screw. A shop towel should be used to catch leaking fuel before lifting and twisting the Fuel Pressure Regulator to unhook it from the Fuel Rail. Beginning with the removal of both the retainer and spacer bracket, the technician proceeds to separate the Fuel Pressure Regulator from the engine fuel return pipe before discarding the inlet o-ring. Before installing the fuel return line you must first connect it to avoid having the regulator rotate because this could harm the retainer and spacer bracket while creating a fuel leakage. Test and cleaning operations should never use compressed air when working with the Fuel Pressure Regulator because damage could occur during these procedures. The filter screen requires cleaning with gasoline but the regulator should never be submerged in solvent baths. Before mounting the pressure regulator always check the filter screen for contamination because a contaminated screen requires replacement of the Fuel Pressure Regulator. Put clean engine oil on the new inlet o-ring before mounting it onto the regulator inlet port. First connect the fuel return pipe to the regulator before putting the new retainer and spacer bracket inside the Fuel Rail slot. Secure the pressure regulator onto the Fuel Rail by tightening its nut to 17 n.m (13 lb ft). The vacuum line should be reconnected by installing an attaching screw which needs to be secured at 8.5 n.m (76 lb in). You should verify the retainer together with spacer bracket securely connects to the Fuel Rail slots by applying force to the regulator. Before concluding the procedure install the fuel filler cap while inspecting for any fuel leaks during the following sequence: turn the ignition on for two seconds followed by ten seconds off and another two seconds on for inspection.

One must first release fuel system pressure before performing any work on the Fuel Pressure Regulator. The first step includes cutting the vacuum connector from the Fuel Pressure Regulator while unscrewing its mounting screw. A shop towel should be used to contain fuel drips before you detach the Fuel Pressure Regulator from the Fuel Rail by lifting and twisting it. Separate the rail retainer with spacer bracket before removing the Fuel Pressure Regulator from the engine fuel return pipe and discarding its inlet o-ring. A fuel return line connection at the beginning of installation stops the regulator from spinning because this motion might destroy the retainer and spacer bracket and trigger a fuel leak. You must not utilize compressed air either for examination or cleansing duties of the Fuel Pressure Regulator since it will lead to damage. You can apply gasoline to clean the filter screen but you should never subject the regulator to solvent immersion for cleaning. The filter screen must be inspected for contamination; if contamination is present then change the Fuel Pressure Regulator. The new inlet o-ring requires lubrication using engine oil then needs installation onto the regulator inlet port. Begin by affixing the fuel return pipe to the regulator before installing the new retainer together with spacer bracket into the Fuel Rail slot. Position the Fuel Pressure Regulator on the Fuel Rail after installing the new retainer and spacer bracket into the slots of the rail. Tighten the engine fuel return pipe nut to 17 n.m (13 lb ft). Use the Fuel Pressure Regulator vacuum line before tightening its attaching screw to 8.5 n.m (76 lb in). To verify correct seating of the regulator check that you can pull the regulator easily before tightening the fuel return pipe nut to 17 n.m (13 lb ft) while also making sure the retainer and spacer bracket sits in the slots of the Fuel Rail. Verify fuel leakages by operating the ignition for two seconds then turning it off for ten seconds before repeating the process while inspecting for any fuel leaks. Reinstall the fuel filler cap afterward.

Verify that the retainer and spacer bracket are engaged in the slots in the fuel rail by pulling on the regulator to ensure it is properly seated.

The fuel pressure regulator vacuum line.

The fuel pressure regulator vacuum line.

Discard the inlet O-ring.

Connect the fuel return line.

Relieve the fuel system pressure.

Reinstall the fuel filler cap and reconnect the negative battery cable.

8.5 N.m (76 lb in).

Relieve the fuel pressure.

Remove them from the rail and discard them.

Relieve the fuel pressure and ensure cleanliness when handling fuel system components.

Clean it with gasoline without immersing the regulator in a solvent bath.

To prevent the regulator from rotating, which could damage the retainer and spacer bracket and lead to a fuel leak.

Use a shop towel to catch any spilled fuel.

Lift and twist it.

Remove and discard them, along with the fuel pressure regulator inlet and fuel return pipe O-rings.

8.5 N.m (76 lb in).

Using compressed air may cause damage to the regulator.

Lubricate it with clean engine oil.

The fuel pressure regulator vacuum line.