Too bad the engine's quiet, purposeful demeanor is less exciting than the old V - 8. (automobilemag.com)
(possible bad engine mounts) Around the city: Do you notice any hesitation or stumbling during acceleration? (samarins.com)
It can also mean there is less fuel than usual such as a weak fuel pressure, dirty fuel injectors, bad O2 giving computer a bad reading so fuel is lessened, bad engine coolant temperature sensor giving computer a hot reading so fuel is lessened. (answers.yahoo.com)