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Backfire troublesSoftail Models |
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Jun 30th, 2008, 11:42 PM
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#1 (permalink) |
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New Family
Ride: 2003 Fatboy FLSTFI
Join Date: Jun 30th, 2008
Posts: 2
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Backfire troubles
Greetings, I have a 2003 Fatboy (Fuel Injected) 100% stock with 4,200 miles, that has developed an occasional hesitation and backfire through the intake (not an exhaust pop) when you crack the throtle from an idol or rounding a corner. I have had it checked for intake leaks, exhaust leaks and all checks out fine. I have tried different fuels, changed plugs and air cleaner and I have run out of ideas. Can anyone offer any suggestions? Thank you,
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Jul 1st, 2008, 07:40 AM
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#2 (permalink) |
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Community Liaison
Ride: 07 Road King Classic
Join Date: Jun 21st, 2007
Posts: 11,619
My Mood:
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Re: Backfire troubles
Aside from an intake leak causing this, I would do a compression test to check the condition of the valves as a possible source. Usually a lean mixture will cause this and an intake leak on a FI bike would be the first place I would look.
__________________
Psssst!  Please stop by the "self help section" for maintenance tips, diagnostic codes and much more. click me!>>Self Help Information and Tips<< click me! |
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Jul 1st, 2008, 01:52 PM
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#3 (permalink) |
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Play The Throttle
Ride: 1994 Road King FLHR
Join Date: Jun 21st, 2008
Location: Tourist/Snowbird Infested Florida
Posts: 293
My Mood:
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Re: Backfire troubles
I know this may sound wierd, but check your cam position sensor. You may have a bad wire or the sensor may be going out. I had a problem on my Dyna where the bike would backfire thru the intake...
Some times it would do it when you rev'ed the motor from idle. Some times when accelerating going around corners or in a straight line. Some times it would go days without any problem. It got to the point where the bike would backfire and then quit. The Stealer said they couldn't find the problem. The next time it happened, I troubleshot it with no problem... Took it to the dealer, showed them what I found and they changed the sensor under the emissions warranty. The troubleshooting for the sensor is in the manual...
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77 FXE "Shaker", 94 FLHR "Primitive Man", 96 FXD "Miss Low" My Newest "Harley", MV Agusta F4 1000 S (05) Track Day Bike: 2000 Ducati 996 SPS |
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