Engine Is Hard To Start
Definition:
Engine cranks OK, but does not start for a long time. Engine does run, or may start but immediately die.
Step
Action
Yes
No
1
Perform OBD System Check.
Are any DTCs found?
Go to applicable DTC Table.
Go to step 2.
2
Perform a careful visual check.
Is a problem found?
Repair
Go to step 3.
3
Check the following fuel system components for dirt, water, or other
contaminants.
•
Fuel tanks
•
Fuel filter
•
Fuel lines
•
Fuel pumps
Is a problem found?
Repair
Go to step 4.
4
Verify that there is fuel flow flow from the mechanical fuel pump to
the fuel injector.
Is a problem found?
Repair
Go to step 5.
5
Check battery as follows:
•
Look for loose or corroded terminals.
•
Verify battery voltage is 12.2-13.5 volts.
Is a problem found?
Repair
Go to step 6.
6
Check engine for the following mechanical problems:
•
Low compression.
•
Leaking cylinder head gaskets.
•
Proper valve set up.
Is a problem found?
Repair
Go to step 7.
7
Review diagnostic procedures in this table. If all steps have been
completed and no problems have been found, proceed as follows:
•
Repeat visual check.
•
Review Diagnostic Tool/Code Reader data.
•
Check all electrical connections within the suspect circuit and/
or system.
Is a problem found?
Repair
Contact engine
manufacturer.
68
Not for
Reproduction
Summary of Contents for 25E300
Page 1: ...Vanguard EFI Diagnostics and Repair 25E300 REPAIR MANUAL N o t f o r R e p r o d u c t i o n...
Page 18: ...Model 25E300 EFI Component Locations 19 N o t f o r R e p r o d u c t i o n...
Page 26: ...Speed vs Voltage Table 8 27 N o t f o r R e p r o d u c t i o n...
Page 61: ...25E300 Wiring Harness Diagram 62 vanguardpower com N o t f o r R e p r o d u c t i o n...
Page 62: ...63 N o t f o r R e p r o d u c t i o n...
Page 88: ...Model 25E300 Fuel Hose Location and Routing Tankless 89 N o t f o r R e p r o d u c t i o n...
