1999 Chevrolet Lumina - Plenum Gasket Set

Fuel Injection Plenum Gasket Replacement

A fuel injection plenum gasket is a crucial component in the intake system of a fuel-injected engine, and maintains a seal between the intake manifold and the plenum chamber. This is the area where the fuel and air mixture is distributed to the engine's cylinders to help engines run their best. The plenum gasket is typically made of rubber, silicone, or a composite material with high heat and chemical resistance to prevent air or fuel to leak and ensure a proper seal between the intake manifold and the plenum chamber. When a plenum gasket fails, the engine may pull in unfiltered air. This may allow debris and dust into the engine, which can block valves and corrode cylinders over time. Bypassing the mass air flow (MAF) sensor may also cause a vehicle to pull in unmetered air and run lean. This can cause rough idle, stalling, and poor acceleration. When replacing a plenum gasket, be sure to clean the surfaces of any residue before installing the new gasket to ensure a proper seal and a lasting repair. O'Reilly Auto Parts carries a variety of plenum gaskets and plenum gasket kits for many types of vehicles, as well as intake manifold gaskets, exhaust manifold gaskets, and gasket remover for a complete repair.