With the Mazda Mpv i notice if one fuse blows like the cig ligther fuse it can cause the van to run differently slower.The cigarette lighter fuse also controls the radio on the 2000 mpv, though it's not clearly marked on the panel description. Try replacing that one. The bigger question, however, is why the fuse blew. Check anything plugged in to those ports to see what might have blown the fuse.
mazda, mpv, cigarette, fuse