Having issues with rough idling....changed spark plugs and wires plus fuel filter. Smells of gas coming out of exhaust. Wondering if it might possibly be the O2 sensor or MAP Sensor? Where are these located also?
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Faulty O2 sensor would cause it to run rich if it hasn't set a code. If the '94 is anything like the '93, check the fuel pressure regulator, mine had a ruptured diaphram and was sucking unmetered gas into the intake.