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The Fermi Large Area Telescope (LAT) is a powerful pulsar detector, asdemonstrated by the over one hundred objects in its second catalog of pulsars.Pass 8 is a new reconstruction and event selection strategy developed by theFermi-LAT collaboration. Due to the increased acceptance at low energy, Pass 8improves the pulsation detection sensitivity. Ten new pulsars rise above the 5sigma threshold and are presented in this work, as well as one previously seenwith the former Pass 7 reconstruction.  More than 60$\%$ of the known pulsars with spin-down power ($\dot{E}$)greater than $10^{36}$ erg/s show pulsations in gamma-rays, as seen with theFermi Large Area Telescope. Many non-detections of these energetic pulsars arethought to be a consequence of a high background level, or a large distanceleading to a flux below the sensitivity limit of the instrument. The gamma-raybeams of the others probably miss the Earth. The new Pass 8 data now allows thedetection of gamma ray pulsations from three of these high spin-down pulsars,PSRs J1828$-$1101, J1831$-$0952 and J1837$-$0604, as well as three others with$\dot{E}$ $\ge 10^{35}$ erg/s. We report on their properties and we discuss thereasons for their detection with Pass 8.

New pulsars detected in gamma-rays with the Fermi-LAT