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Where is the fuel filter in a 1990 Mercury Grand Marquis with 5.0 L engine?

The fuel filter on a 1990 Mercury Grand Marquis with a 5.0L engine is located in the fuel tank. Unlike many vehicles where it's a replaceable cartridge easily accessed under the car, this model integrates the filter into the fuel pump assembly *inside* the fuel tank. This means you'll need to drop the fuel tank to replace it.