What was found
#1 ENGINE FAILED TO START USING "L" IGNITION. GROUNDED - YES. ACCOMPLISHED #1 ENGINE EEC BITE PROCEDURE, B737-800 FIM 73-00 TASK 801. NO FAULTS NOTED. PER FIM 74-21 TASK 806 STEP B.(2), REPLACED #1 ENG LEFT IGNITER PLUG REF B737-800 AMM 74-21-02. NO HELP. REPLACED #1 ENG. LEFT IGNITION EXCITER REF AMM 74-11-01. NO HELP. REMOVED #1 ENG LEFT IGNITION LEAD REF AMM 74-21-01. INSTALLED NEW #1 ENG. LEFT IGNITION LEAD REF AMM 74-21-01. ACCOMPLISHED AUDIBLE TEST AND IDLE ENG START REF AMM 71-00-00 TABLE 502. TEST NORMAL. NO DEFECTS NOTED.