Increasing environmental concern, depleting oil and natural resources are the driving forces in promoting biodiesel as an alternate fuel. Vegetable oils are considered as good alternatives to diesel as their properties are comparable to diesel and at present biodiesel are commercially produced from vegetable oils by esterification processes. Since most of these oils are edible, its cost restricts the usage. The de-oiled cakes after crushing the seeds contain around 2% of oil with less fatty materials has been considered in this study, by complementing with diesel fuel. The fuel is prepared by adding dry coconut de-oiled cake (Coc) powder at 15 percent by weight with diesel, and methyl esters of Jatropha (MEJ), while Jatropha seeds which are transesterified and blended with diesel in 15% percent. Experimental results reveal that the fuel has the potential in reducing the smoke levels, carbon monoxide, unburnt hydrocarbon emissions simultaneously along with a marginal increase in brake thermal efficiency and oxides of nitrogen.