install a cold air intake. more air with same amount of fuel being injected will lean out the fuel/air mixture. plus you'll get more power
Adjust the fuel/air mixture, ensure you have an unclogged air filter/air cleaner.
Simple answer: air/fuel mixture is off. Too lean means too little fuel, too rich means too much fuel. Can be adjusted via air/fuel screw on a carb or via a remap on EFI. If you make changes to the air flow, you need to adjust the fuel as well.
Excess gas coating? Do you mean unburnt fuel is entering the converter? If so, then the fuel/air mixture is too rich, or you have a cylinder that is not firing.
You should check the O2 Sensor. These little goodies control your air to fuel mixture. If these are in good shape and working proper. then check your wiring.
Start by checking your basics. Spark, fuel, compression, and air/fuel mixture.
first thing to do is change air filter. if air filter is dirty or clogged it will restrict air flow, making mixture lean. if that doesnt fix problem, a mechanic can connect computer and adjust settings
Black spark plugs indicate that the fuel mixture is too rich in fuel. White spark plugs indicate that the fuel mixture does not have enough fuel. The proper color for spark plugs is tan. Black spark plugs also indicate that oil is entering the combustion chamber and burning. If your lawnmower is 2 stroke, this is probably normal due to the gas/oil mix of fuel added to the tank. If your lawnmower is 4 stroke, you need to adjust the carbs to reduce the amount of fuel in the fuel/air mix.
This is "Fuel/Air Mixture too lean on bank 2".Possible Causes:Intake air leaksFaulty front heated O2 SensorIgnition MisfireFaulty Fuel InjectorsExhaust gas leakIncorrect Fuel PressureLack of fuelFaulty (MAF) sensorPCV hose connected incorrectly
If the fuel is running too rich in a car, it would be a good idea to adjust the EFI or Electronic Fuel Injector (carburetor). It would also be a good idea to make sure that all of the air cleaners and oxygen sensors are clean and functioning properly.
how fix Code P1140 fuel air
By adjusting Mixture with Bosch KE3-Jetronic Mixture Adjustment
Fuel trim rich.