Dodge ram truck 3500 1996 Service Manual page 1005

B R — — — ENGINE 9 - 1 5
D I A G N O S I S AND T E S T I N G (Continued)
S E R V I C E DIAGNOSIS—DIESEL—PERFORMANCE—CONT.
CONDITION
POSSIBLE CAUSES CORRECTION
ENGINE HARD TO START,
1. Incorrect starting procedure. 1 . The fuel shutoff solenoid control must
OR WILL NOT S T A R T -
be in the run position. Ensure proper
SMOKE FROM EXHAUST
procedure is being used.
2.
Cranking speed too slow. 2. A. Verify that the transmission is not
engaged.
B. Check the battery, starting motor and
look for loose or corroded wiring
connections.
C. Rotate the engine with barring tool
(Snap-on Tool SP371, MTE No.
3377462, or equivalent) to check for
external rotational resistance.
3. Intake heater system not
working.
3. Verify system is working. Repair/replace
inoperative parts.
4.
Insufficient intake air. 4. Inspect or replace filter and check for
obstructions to the air supply tube.
5. Air in fuel system or the fuel
supply is inadequate.
5. Check the flow through the filter and
bleed the system. Locate and eliminate
the air source.
6. Fuel transfer (lift) pump. 6. Measure transfer pump outlet pressure.
If needed, repair or replace pump.
7. Injection pump throttle linkage
loose or damaged.
7. Visually check the linkage.
Adjust/replace linkage.
8.
Contaminated fuel.
8. Verify by operating the engine with
clean fuel from a temporary tank. Check
for presence of gasoline. Drain and
flush fuel supply tank. Replace
fuel/water separator filter.
9. Fuel screen plugged.
9. Check fuel screen.
10. One or more injectors worn or
not operating properly.
10. Check/replace improperly operating
injectors.
11. Worn or inoperative injection
pump.
11. Visually check fuel delivery with an
externally connected injector to one of
the pump outlets. Repair or replace the
pump if fuel is not being delivered.
12.
Injection pump out of time. 12. Check/Time the pump (refer to Group
14, Fuel System).
13.
Valves incorrectly adjusted.
13. Adjust valves.
14.
Engine compression low. 14. Check compression to identify the
problem.
J9509-146