The fuel filter on your 1992 Pontiac Bonneville protects fuel injectors’ nozzles, pressure regulator and other components from damage caused by dirt, rust and other contaminants in the fuel. However, these tiny particles accumulate in the filter element over time, restricting fuel flow and causing engine performance problems. You can fix this problem by servicing and replacing the fuel filter in your Bonneville using just a few simple tools you might already have in your toolbox.
Tools Used: Tools, Wrench, Ratchet, Socket, Shop rag, Standard screwdriver, Floor jack, Jack stand, Clean engine oil
Replace a Fuel Filter
Relieve the Fuel System Pressure
Loosen the fuel filler cap. Open the hood and detach the ground (black) battery cable using a wrench. Remove the sight shield or cover from the top of the engine if your Bonneville model comes equipped with it. Use a ratchet and socket. Located on the fuel rail manifold–where the fuel injectors connect to–the fuel pressure connection valve and remove the cap from it. This valve is similar to the air valve on your Bonneville tires.
Wrap a shop rag around the valve and depress the inside stem on the valve with a standard screwdriver to release the fuel system pressure. Use the rag to catch the spray of fuel when you depress the stem. Then replace the cap on the pressure valve. Install the sight shield or cover to the top of the engine, if your Bonneville is equipped with it. Use the ratchet and socket.