roubleshooting Symptoms Charts
B3.9 and B5.9 Series Engines
Section TS - Troubleshooting Symptoms
Check the fuel lift pump for correct operation.
Check the pump output pressure. Replace the
Fuel lift pump is malfunctioning
fuel lift pump if necessary. Refer to Procedure
Check the overflow valve. Refer to Procedure
uel pump overflow valve is malfunctioning
Check for air in the fuel system. Repair source
ir in the fuel system
of leak and bleed air from the system. Refer to
Check the air intake system for restriction.
ir intake system restriction is above specifica-
Clean or replace the air filter and inlet piping
as necessary. Refer to Procedure 010-031.
Inspect the CAC for air restrictions or leaks.
harge-air cooler (CAC) is restricted or leaking
Refer to Procedure 010-027.
Inspect the air intake and exhaust systems for
air leaks. Refer to Procedure 010-024.
Check the turbocharger part number and
compare it to the Control Parts List (CPL),
Bulletin No. 3379133. Replace the turbo-
urbocharger is not correct
charger if necessary. Refer to Procedure
urbocharger wastegate is malfunctioning (if
Check the wastegate for correct operation.
Refer to Procedure 010-050.