Troubleshooting - Honda 2005-2008 RX500 FA Service Manual

'61HN252' by American Honda Motor Co. - Page 116 of 540
[2005-2008] [TRX500 FA/FGA]
FUEL SYSTEM

TROUBLESHOOTING

Engine cranks but won't start
· No fuel in tank
· No fuel to carburetor
Clogged fuel strainer
Clogged fuel line
Clogged fuel tank breather hose
Misadjusted fuel level
· Too much fuel getting to the engine
Clogged air cleaner
Flooded carburetor
· Intake air leak
· Contaminated/deteriorated fuel
Clogged jets
· Clogged starting enrichment (SE) valve circuit
· Improper choke operation
· Improper throttle operation
· No spark at plug (faulty ignition system
Lean mixture
· Clogged fuel jets
· Faulty float valve
· Float level too low
· Restricted fuel line
· Clogged carburetor air vent hose
· Restricted fuel tank breather hose
· Intake air leak
· Faulty vacuum piston
· Faulty throttle valve
Rich mixture
· SE valve open (ON)
· Clogged air jets
· Faulty float valve
· Float level too high
· Dirty air cleaner
· Clogged slow circuit
· Clogged SE valve circuit
· Worn jet needle or needle jet
· Faulty vacuum piston
Engine stalls, hard to start, rough idling
· Restricted fuel line
· Fuel mixture too lean/rich
· Contaminated/deteriorated fuel
Clogged jets
· Intake air leak
· Misadjusted idle speed
· Restricted fuel tank breather hose
· Dirty air cleaner
· Misadjusted pilot screw
· Faulty ignition system
Afterburn when engine braking is used
· Lean mixture in slow circuit
· Faulty ignition system
Backfiring or misfiring during acceleration
· Lean mixture
· Faulty ignition system
Poor performance (drive-ability) and poor fuel economy
· Clogged fuel system
· Faulty ignition system
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http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2...
3/9/2008 10:44 PM