The EGR (Exhaust Gas Recirculation) valve on a 1985 Isuzu Trooper is typically located on the engine intake manifold, near the back of the engine. It connects to the exhaust manifold via a metal pipe. To access it, you may need to remove some components such as the air intake or other hoses for better visibility and reach. Always refer to a repair manual for specific details related to your vehicle's configuration.
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