B757-200
Flight Crew Air Transport Pilot (ATP)
Time Pressure; Situational Awareness
Aircraft Equipment Problem Critical
Flight Crew Rejected Takeoff; Flight Crew Returned To Gate
Aircraft
Between setting Standard Power and 80 KTS; both the Pilot Flying and I (Pilot Monitoring) noticed an engine surge on the left EPR gauge as well as feeling it.  The Captain rejected the takeoff at 80 KTS.  The surge was approximately +/- .1 EPR.
[Reporter contains no additional information]
A B-757 crew reported a rejected takeoff at 80 kts because of a +/_ 0.1 EPR fluctuation.