2003 Harley Davidson FLSTF Fat boy Logo
Posted on Jan 13, 2011
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Bike began running rough so I changed the oil, cleaned the K&N air filter and now the 2003 FatBoy Fuel Injected, dies after about 20 seconds of idling and is gurgling and spitting massive amounts of oil out of the little hoses behind the air cleaner. Also, the bike has VERY low throttle response when in gear. Any idea what would cause this? Oh, and now I can't even read the oil level on my dipstick due to the fact it is significantly LOW. Thank you.

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  • Anonymous Jan 13, 2011

    It sounds like air is not getting through the filter housing and creating suction. Check air filter / housing / airways.

    Charlie

  • devildan_lvm Jan 13, 2011

    I will check tonight. Thank you for your time and input. Semper Fidelis!

  • Anonymous Jan 13, 2011

    You are welcome. Pls let me know what you find.

    Charlie

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  • Posted on Jan 14, 2011
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"Oh, and now I can\'t even read the oil level on my dipstick due to the fact it is significantly LOW" This is not a good sign. Now, my expertise is NOT on the Twin Cam bikes but I do try to help when I can. In your case, if your engine were an earleir Evolution or Shovelhead engine, I'd say that you had sheared a scavenge gear drive key in the oil pump. Now, I do not know a thing about the oil pump in a Twin Cam as I've never worked on one. It sounds like your oil pump is not scavenging (sucking) the oil out of the engine and pumping it back to the oil tank. Once the pump pumps the oil into the engine, it stays there. Thats why you're seen the "massive amounts of oil spitting out of the little hoses behind the air cleaner". Take your bike to a dealer or qualified shop as soon as possible and I'd refrain from running it. An engine full of oil would also expain why the engine does not want to run as well.

Good Luck
Steve

  • Anonymous May 11, 2011

    Check and see if your pressed together crank did'nt take a dump on you. If you have less than 50,000 miles Harley may fix it for you. A seldom talked about Twin Cam engine problem is crankshaft shifting. Unlike the Evolution and Shovelhead cranks, the TC crank is a press-together unit where the crankpin is a "hard" press fit into the two flywheels halves. Under most circumstances, this design works well. However, in some cases, under hard deceleration and acceleration or ground-pounding tire burnouts, the three-piece pressed-together crankshaft can twist out of true, sometimes as much as .030-inch, or even more in the worst situations. Ideally, the crankshaft should be trued during assembly to within .001-inch. Under high power and torque conditions, a TC's flywheels can shift on the crankpin, causing the crank assembly to become severely out of true. This results in a severe wobbling of the right-side pinion shaft, which is located in the camshaft's gearcase. A wobbling pinion shaft often causes catastrophic damage to the engine's oil pump and cam support plate along with a loss of oil pressure and oil scavenging. Early warning signs include loud noises from the engine's gearcase area, ticking lifters, and oil dumping out of the cylinder head breathers.

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