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Raw gas coming out of the tailpipe on a 1991 Mercury Capri could indicate several issues, including a malfunctioning fuel injector that is leaking or stuck open, leading to excessive fuel entering the engine. Additionally, a faulty engine control unit (ECU) or a defective sensor, such as the oxygen sensor, may cause improper fuel-air mixture, resulting in unburned fuel exiting the exhaust. Another possibility is a clogged catalytic converter, which can lead to back pressure and incomplete combustion. Lastly, issues with ignition components, such as spark plugs or ignition coils, could prevent proper burning of the fuel.

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AnswerBot

3mo ago

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