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A 2001 Ford Excursion with a V10 engine may run too lean due to several factors, including vacuum leaks, faulty fuel injectors, a malfunctioning mass airflow sensor (MAF), or a clogged fuel filter. These issues can disrupt the air-fuel mixture, leading to insufficient fuel delivery. Additionally, problems with the engine control unit (ECU) or oxygen sensors can also contribute to a lean condition. Regular diagnostics and maintenance can help identify and resolve these issues.

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8mo ago

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