Troubleshooting - Honda C8R600F4 Service Manual

TROUBLESHOOTING
Engine cranks but won't start
•No fuel in tank
• No fuel to carburetor
-Clogged fuel filter
-Clogged fuel line
-Clogged fuel tank breather tube
•Too much fuel getting to the engine
-Clogged air cleaner
Flooded carburetor
•Intake air leak
•Contaminated/deteriorated fuel
•Improper choke operation
•Improper throttle operation
•Fuel pump system malfunction
•No spark at plug (faulty ignition system-section 17)
Engine stall:;, hard to start, rough idling
•Restricted fuel line
• Fuel mixture too lean/rich
•Contaminated/deteriorated fuel
•Intake air leak
• Misadjusted idle speed
• Misadjusted pilot screw
• Restricted fuel tank breather tube
•Clogged air cleaner
•Clogged slow circuit
•Starting enrichment valve open
•Fuel pump system malfunction
• D.A.I. system malfunction
•Faulty EVAP CAV and/or EVAP purge control system
(California type)
•Faulty ignition system (section 17)
Afterburn when engine braking is used
• Lean mixture in slow circuit
•Faulty air cut-off valve
•Faulty pulse secondary air injection (PAIR) system
•Faulty ignition system (section 17)
Backfiring or misfiring during acceleration
• Lean mixture
• Faulty ignition system (section 17)
Poor performance (driveability)
• Clogged fuel system
• t-uel pump system malfunction
• D.A.I. system malfunction
•Faulty EVAP CAV control system (California type)
• Faulty ignition system (section 17)
FUEL SYSTEM
Lean mixture
• Clogged fuel jets
• Faulty float valve
• Float level too low
•Restricted fuel line
•Restricted fuel tank breather tube
•Intake air leak
• Faulty vacuum piston
•Fuel pump system malfunction
•Faulty EVAP CAV control system (California type)
Rich mixture
•Starting enrichment valve open
•Clogged air jets
• Faulty float valve
• Float level too high
• Dirty air cleaner
• Faulty vacuum piston
•Faulty EVAP purge control system (California type)
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