Honda V65 Magna-VF1100C 1983 Shop Manual page 60

FUEL SYSTEM
TROUBLESHOOTING
Engine cranks but won't start
1. No fuel in tank
2. No fuel to carburetor
3. Engine flooded with fuel
4. No spark at plug {ignition system faulty)
5. Air cleaner clogged
6. Intake air leak
7. Improper choke operation
8. Improper throttle operation
9. Faulty purge control valve
Hard starting or stalling after starting
1. Improper choke operation
2. Ignition malfunction
3. Carburetor faulty
4. Fuel contaminated
5. Intake air leak
6. Idle speed incorrect
7. Faulty purge control valve
Rough idle
1. Ignition system faulty
2. Idle speed incorrect
3. Incorrect carburetor synchronization
4. Carburetor faulty
5. Fuel contaminated
Misfiring during acceleration
1. Ignition system faulty
Backfiring
1. Ignition system faulty
2. Carburetor faulty
Poor performance {driveability) and poor fuel economy
1. Fuel system clogged
2. Ignition system faulty
4-2
lean m ixture
1. Clogged fuel jets
2. Vacuum piston stuck closed
3. Faulty float valve
4. Float level low
5. Fuel cap vent blocked
6. Fuel strainer screen clogged
7. Restricted fuel line
8. Air vent tube clogged
9. Intake air leak
10. Restricted or faulty fuel pump
Rich mixture
1. Clogged air jets
2. Faulty float valve
3. Float level too high
4. Choke stuck or clogged
5. Dirty air cleaner