2004 Fatboy FLSTFI
2004 Fatboy FLSTFI
my o4 fatboy has been sputtering like starving for gas it will sometimes stall...also I get a high revving from throttle this happens riding or idling i jus paid 1200 bucks to fix this at a shop and on the way home same deal...im at a loss...btw i am a lady rider but i do have some knowledge...so i can tell you what they have done...plugs were changed, fuel injection done...etc could it maybe be a hole inside my gas line in tank?
Supporter
Joined: May 2010
Posts: 33,706
Likes: 136,127
From: SoCal
My thought is you are correct on the gas line in the tank. I had to replace this on my 05 fatboy...coming up to stop, with a couple gallons still in the tank, and she would sputter and stall. Gas was not getting pulled up properly due to pinhole in the line.
Advanced
Joined: Aug 2014
Posts: 63
Likes: 15
From: St. Petersburg, FL
Be sure to look at your fuel pump housing. They have a habit of breaking the tabs that hold it together. When the tabs break, it allows the o-ring seal to become dislodged and the gas to escape the housing, lowering pressure to the fuel injector. Ask me how I know. '03 FLSTFI.
Last edited by mplazz; Oct 11, 2017 at 08:54 PM.
Cruiser
Joined: Jun 2007
Posts: 160
Likes: 24
From:
One way to eliminate the lines in the tank is to fill up the tank and see if your problems stop. If its a hole in the feed line, filling the tank will cure the problem till the fuel level drops below where the hole in the line is. easy way to verify.
Tourer
Joined: Dec 2015
Posts: 338
Likes: 82
From: England
Aside from the pin hole in the tank's internal fuel line, you might want to check a simple thing.
With the ignition off, it might be worth removing your air filter and looking into the throttle body whilst moving the throttle.
The blade on the throttle butterfly can crack and exhibit some of the problems you're experiencing from stalling through to high revving as the butterfly hooks up and doesn't do what you are asking it to do at the throttle grip.
Sometimes it's quite apparent when you look, sometimes you have to look closely.
In a way I hope it's not the issue as it can be quite expensive to resolve.
good luck.
With the ignition off, it might be worth removing your air filter and looking into the throttle body whilst moving the throttle.
The blade on the throttle butterfly can crack and exhibit some of the problems you're experiencing from stalling through to high revving as the butterfly hooks up and doesn't do what you are asking it to do at the throttle grip.
Sometimes it's quite apparent when you look, sometimes you have to look closely.
In a way I hope it's not the issue as it can be quite expensive to resolve.
good luck.
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Banned
Joined: Jan 2012
Posts: 3,098
Likes: 474
From: Location location.
Take it back ,you paid for a fix and it's not one.
Yea the fuel line thing has merit , so yea why didn't they pick that up FFS ?
Yea the fuel line thing has merit , so yea why didn't they pick that up FFS ?
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Road Captain
Joined: Oct 2012
Posts: 538
Likes: 88
From: Dallas
The combination of the sputtering & stalling and the Hi-Reving leads me to believe that you have Throttle Body Issues.
But...I would follow the advice above and eliminate the issues you can do on your own.
1. Do the fill-up and check for sputtering & stalling. If that stops it, you have diagnosed that part of your issue.
2. Remove the Air Cleaner and check your Throttle Body Blade for cracks and smoothness of opening and closing. I would get a decent magnifying glass, watch very closely as the blade is opened and closed while having a friend work the throttle open and closed. Also look at the walls of the Throttle body and see if there are scrapes where the Blade is making contact with the wall when the bike is at normal operating Temp. Metal expands as it gets hotter
I have a couple other questions.
1. Does the Hi-reving only happen when the bike is warmed up and at normal operating temperature.
2. When you said the Fuel Injection was done, did you mean the Fuel Injectors were changed out and a new fuel pump was installed?
But...I would follow the advice above and eliminate the issues you can do on your own.
1. Do the fill-up and check for sputtering & stalling. If that stops it, you have diagnosed that part of your issue.
2. Remove the Air Cleaner and check your Throttle Body Blade for cracks and smoothness of opening and closing. I would get a decent magnifying glass, watch very closely as the blade is opened and closed while having a friend work the throttle open and closed. Also look at the walls of the Throttle body and see if there are scrapes where the Blade is making contact with the wall when the bike is at normal operating Temp. Metal expands as it gets hotter
I have a couple other questions.
1. Does the Hi-reving only happen when the bike is warmed up and at normal operating temperature.
2. When you said the Fuel Injection was done, did you mean the Fuel Injectors were changed out and a new fuel pump was installed?
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