TM  10-3930-643-34 ENGINE,  FUEL,  EXHAUST  AND  COOLING  TROUBLESHOOTING  AND  MAINTENANCE. 4-1. Engine,  Fuel,  Exhaust  and  Cooling  Troubleshooting. MALFUNCTION TEST  OR  INSPECTION CORRECTIVE  ACTION d. ENGINE STALLS OR LACKS POWER. Step 1. Perform engine stall test to isolate engine, refer to paragraph 6-3. Step 2. Perform engine cylinder compression test, refer to paragraph 4-1.i. Step 3. Check for dirty or leaking fuel injection nozzles, refer to paragraph 4-12. If repair is necessary, contact General Support. Step 4. Check for loose fuel injection nozzle cap nut. If loose, tighten. Step 5. Check for sticking If repair is necessary, Step 6. Check for blockage If repair is necessary, fuel injection nozzle valve. contact in fuel contact General Support. injection  nozzle General  Support. spray holes. 4-5