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It could be anywhere, so you need to check everything. If there is no puddle or odor with the engine off, then the pump is pushing the gas out through the leak. Common places are: the rubber fuel hoses underhood from the metal fuel lines to the throttle body; the rubber fuel hoses at the fuel filter (which is underneath the car just in front of the right rear wheel); the rubber fuel hoses leading to the tank.
If none of the above, a metal fuel line could be rotted, and the worst rust is usually near the right rear wheel well. But it can be anywhere along the right side of the car.
Also possible is a tank leak, which can usually be smelled anytime, but might be worse with the engine running.
If none of the above, a metal fuel line could be rotted, and the worst rust is usually near the right rear wheel well. But it can be anywhere along the right side of the car.
Also possible is a tank leak, which can usually be smelled anytime, but might be worse with the engine running.