This truck has a new engine, a new throttle assembly and a new oxygen sensor. What's with the black smoke?

In general, the gasoline of automobile engine burns excessively, that is to say, the gasoline composition of the mixture in the cylinder exceeds the normal level. Generally, it is due to the following reasons: dirty air filter and insufficient air intake; The carburetor is broken: the EFI car without carburetor may also be polluted by the oxygen sensor in the exhaust pipe, which can not provide correct information to the gas distribution computer. A small bottle of stone can actually solve the problems of burning oil, emitting blue smoke, no electricity and emitting black smoke, which is attributed to the magical repairing power of graphene contained in the stone.