In this present paper the performance and emission characteristics of single cylinder DI diesel is subjected to addition of diethyl ether by fumigation into the inlet manifold with bio ethanol blended diesel as pilot fuel were discussed. The optimum percentage of bio ethanol blended diesel was chosen by the previous research work carried out by the author. The results are indicated that when fumigated diethyl ether percentages increases, the performances of the engine increases by 30%, 29% and 43% respectively for 10%, 20% and 30%. The smoke density is decreased by 17%, 31% and 32% compared with pure diesel. The emission of Nox and CO were increased at high level loads, the HC emissions were increased for lower loads but small deviations were recorded for higher level loads when the diethyl ether percentages increases.