Following the detection of a puzzling emission-line feature in the X-ray spectrum of thez=0.654high-luminosity quasar PKS 0637–752 (centered at 1.6 keV in the quasar frame) we examined the spectra of allASCAquasars (public as of 1998 July 7) with1<z<5to search for any new, unexpected emission-line features. Out of 35 sources, we found only one source (PKS 2149–302,z=2.345) with a significant emission-line feature, centered at ∼ 17 keV in the quasar frame. The most likely explanation is blueshifted Fe-K emission (the EW is∼300±200&hthinsp;eV). Curiously, if the feature in PKS 0637–752 is due to blueshifted Oxygen VII emission the Doppler factor in both quasars is similar (∼2.7–2.8), implying high velocities of order ∼ 0.75c. ©1999 American Institute of Physics.