Problem with my v6 vortec spends a lot of gasoline

Well in my house it was the catalyst but I tell you to lower the tube to rule out faster

It would be important that you take out the spark plugs to see how they come out of color and that, so we will know if there is a former fuel in the mixture, if it is the case it can be a temperature sensor or oxygen sensor.

Look ps acavo to check oxygen sensors and they are carbonated carbonisted but the computer does not mark a brother of that

By the way, the spark plugs to calibrate ban? And ps do not look dirty of them as it has an oil stain what is the thread of the spark plug but nothing stained the electrode or the rest and ps apparently you know about cars, could you tell me because even with the cold car is there a lot of precion in the radiator?

The upload problem may be that the thermostat is that it is closed and does not open, or the radiator is covered, it verifies is the state of those elements.