The 1995 Chevy Lumina comes equipped with a reliable engine, but a failing exhaust gas recirculation (EGR) valve may throw your Lumina off balance, causing rough idle, stalling and increased fuel consumption. Under proper operation, the EGR valve not only helps your engine run smoothly but also lowers emission gasses in the process. With a few simple tools you might already have in your tool box, you can change the bad valve, restore proper engine operation and keep harmful emission gasses to a minimum.
M/F Take off the ground (black) battery cable with a wrench.
M/F Remove the air cleaner assembly with a Phillips screwdriver, ratchet and socket. Look for the EGR valve near the throttle body, toward the back and top of the engine. If you have a 3.1L or 3.4L engine model, the valve comes equipped with three small, rectangular boxes, about 3 or 4 inches tall, facing each other on a single mounting base. On the 3.8L engine model, the valve is a small cylinder, about 3 to 4 inches tall, with an electrical connector on top.
M/F Label any hoses or electrical wiring you might need to disconnect to gain better access to the EGR valve, depending on your particular model. Use masking tape and a marker.
M/F Unplug the top electrical connector, if your particular valve comes equipped with it.
M/F Unfasten the two valve mounting bolts with a wrench and remove the valve and the gasket located between the valve and the intake manifold where it mounts. Throw the gasket away.
M/F Remove any gasket traces and carbon deposits from the intake opening with a gasket scraper, being careful not to scratch the mounting surface. If necessary, put on a pair of plastic gloves and safety glasses and clean the intake opening of carbon traces with carburetor cleaner and a suitable wire brush.
M/F Place the new valve on the intake opening with a new gasket and thread the two mounting bolts finger tight.
M/F Tighten the two mounting bolts with the wrench.
M/F Plug in the top electrical connector, if your particular valve comes equipped with it.
M/F Replace any hoses and electrical wiring you had to disconnect.
M/F Reinstall the air cleaner assembly with the Phillips screwdriver, ratchet and socket.
M/F Reconnect the ground (black) battery cable with the wrench.