1997 Chevrolet Lumina

Engine Performance problem
1997 Chevy Lumina 6 cyl Front Wheel Drive Automatic 232000 miles

how do you change the fuel pressure regulator?
Do you have to relieve pressure from the system before changing?
November 8, 2008.

* The procedure for removing and replacing the fuel rail, injectors, and pressure regulator varies depending on the vehicle. On some vehicles, the fuel rail must be removed; on others, it does not.
* The regulator is usually mounted on the fuel rail in multiport EFI (Electronic Fuel Injector) applications, or the throttle body assembly in throttle body injection (TBI) applications.
* Some fuel injector types require pressure regulator replacement as an assembly. There are repair kits available for other types.

Replacing a Fuel-Rail-Mounted Pressure Regulator

* Use snap ring pliers to remove the snap ring from the pressure regulator cavity.
* Note the original direction of the vacuum fitting on the pressure regulator and pull the pressure regulator from the fuel rail.
* Clean all components with a clean shop towel.


Do not immerse the pressure regulator in any type of cleaning solvent. This action may damage and contaminate the component.

* Check pressure regulator openings in the fuel rail for metal burrs and damage.
* When reassembling the fuel rail with the injectors and pressure regulator, make sure all O-rings are replaced and lightly coated with engine oil.
* Install the pressure regulator in the fuel rail and position the vacuum fitting on the regulator in the original direction.
* Install the snap ring above the pressure regulator.
* If necessary, reinstall the fuel rail.

Thanks to autozone for this answer.

Nov 9, 2008.