* Intake manifold: The EGR valve itself is bolted to the intake manifold. This is where it introduces exhaust gas back into the intake stream.
* Exhaust manifold (or EGR cooler): A pipe or tube connects the EGR valve to either the exhaust manifold directly or, more likely on this year, to an EGR cooler. The cooler reduces the temperature of the exhaust gas before it enters the intake. This cooler would then be connected to the exhaust manifold.
* Vacuum source: The EGR valve is controlled by a vacuum line connected to the engine's vacuum system. This vacuum signal opens and closes the valve based on engine load and other parameters. The specific vacuum source might vary slightly depending on the exact configuration, but it's generally from the intake manifold or a dedicated vacuum port on the engine.
* EGR temperature sensor (potentially): Some systems include a temperature sensor in the EGR system to monitor exhaust gas temperature. This sensor would be wired into the engine's computer.
In short, the EGR valve is a critical junction point between the exhaust system and the intake system, regulated by the engine's vacuum system and potentially monitored by a temperature sensor.
