Table 2-2. Troubleshooting-CONT
TEST OR INSPECTION
Check for carboned injectors.
Replace injectors. Refer to para. 2-31.
Check if injectors are not seated.
Secure holddown capscrews. Refer to para. 2-31.
Check if injectors stuck.
19. Low Power or Excessive Smoke (Low Turbocharger Boost Pressure).
Check for dirty air filter element.
Check air filter element. Refer to para. 2-18.
Check for intake or exhaust air leaks.
Secure or replace damaged air piping.
Check for excessive intake air restriction by connecting manometer between air filter and
turbocharger. Verify maximum air inlet restriction of 15 in. (380 mm-H20) with clean
Check for excessive exhaust restriction by connecting manometer toto exhaust pipe
fitting. Verify maximum restriction of 3 in.--Hg (75 mm-Hg).
Check for turbocharger bearing damage.
Replace turbocharger. Refer to para. 2-19.
Check for fuel system malfunctioning.
Refer to "Exhaust Smoke Excessive Under Load," Malfunction 23.
Check if fuel pump manual override open.
Make sure manual control knob is in the fully clockwise position.
Check if fuel tank vents plugged.
Remove, clean, replace.
Fuel line restricted.
Check lines from head to tank.
Check if engine running on fumes drawn into air intake.
Close off air intake, locate and isolate the source of fumes.
Change 1 2-30