Riding my 2007 Fatboy to work early yesterday and at 9.5 miles into a 10 mile 0400 ride she began to cough, sputter, and backfire under throttle. I let off the throttle and she idled normally but as soon as I gave her gas she bogged down akin to starting out in 4th gear and sputtered, snuffled, farted and did not want to move. I was able to coax her onto the base and figured after she cooled off the problem might go away (LOL). I came back about 2 hours later and she started right away and seemed to be fine but as soon as I put her in gear she began to misbehave as she did earlier then died and refused to start. I am not out of gas....Between work and sneaking in looks on google it could be a number of things; fuel filter, fuel pump, speed sensor (my buddy swears this is the issue), hole in fuel line.....so the particulars; 2007 Fatboy, Vance and Hines exhaust, power commander, K&N filter and 19k miles on her. I would appreciate any help or advice. This might have to wait as I go overseas for several months next week but I should have email access.

 

Had a similar problem on a bike years ago. In my case it was a blocked fuel filter. Idled just fine because enough fuel was able to get through to keep the engine going (at idle you don't need much), but as soon as I opened the throttle, more air rushed in, but not enough fuel, and the spluttering started. Eased off the throttle, back to idling just fine.

 

there might be a hole in the internal tank fuel lines, it rubs against a metal brace in there, some go soon like yours at 19k miles, mine went at 35k miles, might as well change filter and re route the hose while in there.

 

I had that exact scenario happen a couple years back. The plastic fuel pressure regulator housing inside the tank, had cracked. This bled off fuel pressure.

It was the only time the bike has ever left me stranded

 

It's gonna be a minute now since I am in Japan for a couple of months for work.

 

Finally back from a very long excursion overseas. Replaced the fuel pump, fuel filter, fuel pressure reg, check valve assy, but no joy. Although I had a new fuel pressure regulator housing I did not replace it as...well I forgot where I put the damned thing until I had everything reassembled and back in the tank. She turns over but does even cough, starter is beginning to go as it makes a helluva grinding noise for a sec but resets itself once I let off the start button. One problem at a time though so still it would seem I have a fuel issue or is it now spark?

 

Checked codes and got U1016 at first which indicated an ECM issue, since I had a PC installed (not by me but before I bought the bike) I removed the PC and plugged everything back in without PC. I cleared code then tried to start and while it turns over it does not fire. Code check again shows no U1016 code but 2 new codes; P0261/P0263 so I cleared those and attempted to start but with same results.

 

At first, given the symptoms you described, my guess would have been water in the fuel. Now I'm thinking with fuel delivery or computer issues. Ugh. Sorry I'm no help. Good luck, let us know the resolution.

 

Check the connection at the CKP , clean it with some electrical contact cleaner and check the wires and pins for damage . A faulty CKP can throw a U1016 code when it starts missing the tooth counts / rev . You can try removing it and cleaning it , but replacing it is prob a better option . I'm not one to throw money at an issue but this one sounds like it might be worth a try .

Hook your PC back up , clear your codes , I'm sure the P0261/P0263 codes won't return .

 

P0151 Rear Oxygen Sensor Low / Engine Lean
P0152 Rear Oxygen Sensor High / Engine Rich
P0154 Rear Oxygen Sensor Inactive
P0220 TPS2 Range Error
P0222 TPS2 Low/Open
P0223 TPS2 High/Open
P0261 Front Injector Open/Low
P0262 Front Injector High
P0263 Rear Injector Open/Low
P0264 Rear Injector High
P0265 Rear injector shorted high
P0371 CKP sensor wrong number of pulses
P0373 CKP Sensor Intermittent
P0374 CKP Sensor Synch Error
P0444 Purge Solenoid Open/Low
P0445 Purge Solenoid High
P0501 VSS Sensor Low
P0502 VSS Sensor High/Open
P0503 VSS failed high
P0505 Idle speed control unstable
P0562 Battery/ECM Voltage Low
P0563 Battery/ECM Voltage High
P0572 Brake Switch Low
P0577 Cruise Control Input High

Check here for entire list of codes: https://www.fuelmotousa.com/p-29661-...ble-codes.html