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What would cause a 92 Chevy to idle rough and have gas puddle in the tailpipe?

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Answer

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Wiki User
01/29/2007

If you have gas in the exhaust then you are running the engine too rich, and too much fuel fouls the plugs thus causing the rough idle. I suggest you look at your 02 sensor(s). They are probably fouled too. 02 sensors send a signal to the ECM as to the air to fuel mixture and the ECM then sends a signal to the injectors as too how much fuel to allow into the combustion chamber.