Troubleshooting - Buell Blast 2014 Service Manual

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TROUBLESHOOTING

ENGINE
The following check list can be helpful in locating most oper-
ating troubles. Refer to the appropriate sections in this Ser-
vice Manual for detailed procedures.
Starting Motor Does Not Operate or Does
Not Turn Engine Over
1. Engine run switch in OFF position.
2. Ignition switch not on.
3. Discharged battery, loose or corroded connections.
(Solenoid chatters.)
4. Starter control relay or solenoid not functioning.
5. Electric starter shaft pinion gear not engaging or over-
running clutch slipping.
6. Clutch lever not pulled in.
Engine Turns Over But Does Not Start
1. Fuel tank empty.
2. Fuel valve turned off.
3. Fuel valve or filter clogged.
4. Discharged battery, loose or broken battery terminal con-
nections.
5. Fouled spark plug.
6. Spark plug cable in bad condition and shorting or cable
connections loose.
7. Ignition timing badly out of adjustment.
8. Loose wire connection at coil or battery connection or
plug between ignition sensor and module.
9. Ignition coil not functioning.
10. Ignition module not functioning.
11. Ignition sensor not functioning.
12. Sticking or damaged valve or valves.
13. Engine flooded with gasoline as a result of over choking.
14. Engine oil too heavy (winter operation).
Starts Hard
1. Spark plug in bad condition, have improper gap or are
partially fouled.
2. Spark plug cable in bad condition and shorting.
3. Battery nearly discharged.
4. Loose wire connection at one of the battery terminals, at
coil, or at plug between ignition sensor and module.
5. Carburetor controls not adjusted correctly.
6. Ignition coil not functioning.
7. Engine oil too heavy (winter operation).
8. Ignition not timed properly.
9. Fuel tank filler cap vent plugged, or carburetor fuel line
closed off restricting fuel flow.
10. Water or dirt in fuel system and carburetor.
11. Enrichener valve inoperative.
12. Air leak at intake manifold.
13. Valves sticking.
Starts But Runs Irregularly or Misses
1. Spark plug in bad condition or partially fouled.
2. Spark plug cable in bad condition and shorting.
3. Spark plug gap too close or too wide.
4. Ignition coil not functioning.
5. Ignition module not functioning.
6. Ignition sensor not functioning.
7. Battery nearly discharged.
8. Damaged wire or loose connection at battery terminals
or coil.
9. Intermittent short circuit due to damaged wire insulation.
10. Water or dirt in fuel system and carburetor or filter.
11. Fuel tank filler cap vent plugged or carburetor float bowl
vent closed off.
12. Carburetor controls improperly adjusted.
13. Air leak at intake manifold or air cleaner.
14. Damaged intake or exhaust valve.
15. Weak or broken valve springs.
16. Incorrect valve timing.
Spark Plug Fouls Repeatedly
1. Incorrect spark plug.
2. Piston rings badly worn or broken.
3. Fuel mixture too rich (see CARBURETOR TROUBLE-
SHOOTING).
4. Valve stem seals worn or damaged.
5. Valve guides badly worn.
Pre-Ignition or Detonation
(Knocks or Pings)
1. Excessive carbon deposit on piston head or combustion
chamber.
2. Incorrect heat range spark plug.
3. Spark plug not firing.
4. Ignition timing advanced.
5. Fuel octane rating too low.
6. Intake manifold vacuum leak.
Overheating
1. Insufficient oil supply, or oil not circulating.
2. Leaking valves.
3. Heavy carbon deposit.
4. Ignition timing retarded.
2004 Buell P3: Maintenance
1.26
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