检查下面这句话有没有语病： According to previous researches, the results indicated that the carbon deposition was actually a typical product of diesel combustion whose components were hydrocarbon organic matter and inorganic carbon.

There are no grammar errors in this sentence. However, "researches" should be "research" and "whose components were" can be simplified to "with components of." The revised sentence would be: According to previous research, the results indicated that carbon deposition is a typical product of diesel combustion with components of hydrocarbon organic matter and inorganic carbon.