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TM 9--2815--247--34 0009 00--1 ENGINE RUNS ROUGH OR MISFIRES AND/OR KNOCKS 0009 00 THIS WORK PACKAGE COVERS: Engine Runs Rough or Misfires and/or Knocks INITIAL SETUP: Tools and special Tools General mechanic’s tool kit (item 19, WP 0103 00) Equipment Conditions Vehicle MASTER switch OFF (TM 9--2350--292--10) Engine deck removed (TM 9--2350--292--20) Personnel Required Two Can idle be adjusted properly? Attempt to adjust idle to 825--875 rpm. no yes A WARNING Remove rings, bracelets, wristwatches, and neck chains before working on any vehicle. Jewelry can catch on equip- ment and cause injury, or may short across an electrical circuit and cause severe burns or electrical shock. Go to step D. Are all fuel injector nozzles free of blockage and dam- age? Remove and inspect fuel injector nozzles for block- ages and damage (WP 0036 00). no yes B Replace faulty nozzle(s) (WP 0036 00). Verify fault is corrected. Can fuel metering pump timing be adjusted? Attempt to adjust fuel metering pump timing (WP 0015 00). no yes C Replace fuel metering pump (WP 0039 00). Verify fault is corrected. Replace fuel metering pump advance unit (WP 0088 00). Verify fault is corrected. CONTINUED ON NEXT PAGE FORWARD FUEL METERING PUMP


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