Question about 2000 Harley Davidson FLHR-FLHRI Road king

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2002 roadking flhrci starves for gas

When the bike has a full tank of gas its runs but when its 1-2 gals low ot sounds like it out of gas ans misses and idles high at start up again then idle goes down...

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Hi there , ok, sounds like your tank is not breathing properly, Check that the petrol cap seal is sealing properly , check your fuel valve and hoses and make sure they are not touching the motor anywhere, most bike operate better with the tank in not in a vacuum so make sure that the breather holes underneath are not blocked , the reason why this phenomena happens is because when the tank is full , the shear weight of the fuel forces it to come out in abundantly which satisfies its request for fuel when you nail it, once the weight is lowered so is the pressure and the fuel has no air to replace itself because the breathers are not sucking in enough air to allow the fuel to flow .

Posted on May 11, 2009


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1. Spark plugs in poor condition or partially fouled.
2. Spark plug cables in poor condition and shorting or leaking.
3. Spark plug gap too close or too wide.
4. Faulty ignition coil, ECM, or sensor.
5. Battery nearly discharged.
6. Damaged wire or loose connection at battery terminals,
ignition coil or ECM connector.
7. Intermittent short circuit due to damaged wire insulation.
8. Water or dirt in fuel system.
9. Fuel tank vent system plugged.
10. Air leak at intake manifold or air cleaner.
11. Loose or dirty ECM connector.
12. Faulty Sensor(s): Manifold Absolute Pressure (MAP),
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13. Incorrect valve timing.
14. Weak or broken valve springs.
15. Damaged intake or exhaust valve.
16. Partially plugged fuel injector(s).

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