Black smoke and little power

Good day:

I have a Ford Ranger 93 2.3L 8 spark plugs, it happens that says goodbye a lot of black smoke and has little power when running, the EGR already changed, along with the PCV valve, the filter that goes to between the manufacture and the oil filter was also washed, to one side of the PCV; But the problem continues, any suggestion?

It can be a valvular problem .. bad closure or settlement of some .. seals .. twist .. it can be an idea to take into account. If there is nothing to check the cam diameters .. and pistons rings etc ....

You have to check the oxygen sensors because if those are bad you can also throw more smoke. If the incentors are bad or dirty, it can also throw smoke another cause can be the flow sensor

As Ortiz says about oxygen sensors, I recommend cleaning them with a card I will be stipulated and washed with carbucleaner or some unique chemical because of the opposite you have tested it with the MAP or Mat sensor Disconnect it and if there is any defience in smoke. broken.

Look in what Jose says is the truth, check the oxygen sensor between the air filter and the acceleration body between that things, there can be no air input because it does not fail.