What was found
ON PUSHBACK #2 ENGINE STARTED NORMALLY. DURING ATTEMPTED START OF #1 ENGINE, N1 REACHED 26%,N2 FUEL CUTOFF SWITCHED MOVED TO "RUN", BUT ENGINE VALVE FAILED TO OPEN. GOT "L ENG FUEL" EICAS MESSAGE AND "ENG VALVE" DISCREET LIGHT ILLUMINATED. AC RETURNED TO GATE (BTB). AND MTX GROUNDED AC. MTX ACCOMPLISHED FIM 76-11 FAULT TREE 812 REPLACED 2 FUEL IGNITION CONTROL RELAY K168 OPS CHECK NORMAL IAW WDM 76-11-11 AND 71-00-00 A/C REMAINS ETOPS 180.