I have ford ranger blowing black sut out of tailpipe just had head rebuilt did not help using oil too not leaking?

If your Ford Ranger is blowing black soot out of the tailpipe and consuming oil after a head rebuild, it could indicate a rich fuel mixture or a problem with the fuel injectors, leading to incomplete combustion. Additionally, worn piston rings or valve seals might allow oil to enter the combustion chamber, contributing to the soot and oil consumption. It's advisable to have a mechanic perform a thorough diagnostic to check the fuel system, ignition components, and engine internals.