D.C. Mayor Marion Barry and 70 top D.C. officials returned yesterday from an $8,000 four-day management conference saying they were "all fired up," but had no specific solutions to such problems facing District residents as jobs, housing and better health care.

Instead, Barry said, the group developed a team spirit that Barry said would increase proudcitivity among government workers and would save the city millions of dollars in other ways as well.

"We did not go there to bring back a package of solutions." Barry said at a news conference after he arrived from Berkeley Springs, W.Va., where the conference was held. "We went there to put together a team to solve these problems."

Barry said there has been a negative feeling among some top city official, especially those associated with former D.C. Mayor Walter Washington. "We wanted to break down some of the barriers. . . (Now) there is a definite increase in the trust level among people who work together," Barry said.

Calling the session more than a "pep rally," Barry said the officials started work each day after a 7 a.m. breakfast. They attended seminars on how to manage time effectively, how to move paperwork and how to evaluate employes. He said the group also studied new personnel and financial management systmes in other workshops.

"A lot of intangibles came out of the conference," said Elijah B. Rogers, city administrator. "We now have a better sense of mission."

"We can project that services will improve," Rogers said. "The savings transmitted will be more efficient government."

Colin Walters, assistant city administrator, said some of the employes who worked under Washington had a feeling of new-employes-against-old-employes. "We now have an entirely differnet management style, and we're putting a lot of heat on department heads in one way or another," he said. CAPTION: Picture, Mayor Marion Barry meets press after a weekend management conference. By Margaret Thomas -- The Washington Post