Buell P3 - Page 270

2007 Buell P3: Fuel System 4-3
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HARD STARTING
Check for:
1. Enrichener system plugged, not properly functioning or
improperly operated.
2. Inlet system air leak.
3. Restricted fuel supply.
4. Fuel overflow.
5. Plugged slow jet or passages.
Remedy:
1. Clean, adjust or replace.
2. Correct as required.
3. Correct fuel supply or passages.
4. See OVERFLOW TROUBLESHOOTING above.
5. Clean, clear and correct as required.
POOR PERFORMANCE ON ROAD
Check for:
1. Idle speed improperly adjusted.
2. Inlet system air leak.
3. Restricted fuel tank vent system.
4. Dirty or damaged air cleaner element.
5. Enrichener valve not seated or leaking.
6. Restricted fuel supply tract.
7. Plugged bowl vent or overflow.
8. Loose or plugged fuel and air jets or passages.
9. Worn or damaged needle or needle jet.
10. Vacuum piston assembly malfunction.
Remedy:
1. Adjust operating idle speed.
2. Correct as required.
3. Correct restricted hose. Replace vapor vent valve.
4. Replace.
5. Adjust, clean or replace.
6. Correct and clear restriction.
7. Clean and clear passages.
8. Clean, clear and correct as required.
9. Replace assembly.
10. Refer to Table 4-5.
POOR HIGH-SPEED PERFORMANCE
Check for:
1. Inlet system air leak.
2. Enrichener valve not seated or leaking.
3. Restricted fuel tank vent system.
4. Restricted fuel supply tract.
5. Dirty or damaged air cleaner element.
6. Plugged bowl, vent or overflow.
7. Worn or damaged needle or needle jet.
8. Vacuum piston assembly malfunction.
9. Loose or plugged main jets or passages.
10. Improper fuel level.
Remedy:
1. Clean or replace.
2. Adjust, clean or replace.
3. Correct restricted hose. Replace vapor vent valve.
4. Correct and clean restriction.
5. Replace.
6. Clean and clear passages.
7. Replace assembly.
8. Refer to Table 4-5.
9. Clean, clear and correct as required.
10. Adjust float level.
Table 4-4. Fuel System Troubleshooting