Mechanics

CHEVY FUEL PRESSURE REGULATOR

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?
Avatar
Budmanbrion
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.

NOTE

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.

Tiny
DnaProRacing
Nov 9, 2008.