TM 5-2420-231-23-1
0012
Table 1. Engine Runs Rough or Is Unstable - Continued.
012
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Engine Runs Rough or Is
Test Step 2. Inspect Low-Pressure
Unstable - Continued
Fuel Tubes for Kinks, Damage, and
Loose Connections.
1. Visually inspect low-pressure fuel
Low-Pressure Fuel Hose/Tubes OK -
tubes for kinks, damage, and loose
Proceed to step 2.
connections between the follow-
Low-Pressure Fuel Hose/Tubes
ing:
Kinked or Damaged or Loose -
Replace low-pressure fuel tube
a. fuel tank supply hose (Figure 2,
(Figure 2, Items 2 and 3) (WP 0150).
Item 6) at low-pressure fuel
Proceed to Test Step 5.
pump (Figure 2, Item 5).
Low-Pressure Fuel Hose/Tubes
b. low-pressure fuel tube (Figure
Loose - Replace low-pressure fuel
2, Item 3) between low-
tubes (WP 0150).
pressure fuel pump (Figure 2,
Proceed to Test Step 5.
Item 5) and fuel filter housing
Low-Pressure Fuel Tank Supply
(Figure 2, Item 1).
Hose Kinked, Damaged, or Loose
c. low-pressure fuel tube (Figure
Connection - Tighten or replace fuel
2, Item 2) between fuel filter
tank supply hose (Figure 2, Item 6) (WP
housing (Figure 2, Item 1) and
0137).
fuel pump assembly (fuel
Proceed to Test Step 5.
injector pump) (Figure 2,
Item 4).
NOTE
Fuel filter removed for clarity.
Figure 2. Low-Pressure Fuel Tubes.
0012
