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EFI Sportster Motorcycle Talk (2007 and up) For 2007 and above Sportsters

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  #1  
Old 10th December 2010
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Default Low fuel warning light

Hey guys I have searched but am unable to find any info regarding the low fuel warning light and any possible fix from the moco. Mine comes on after you ride for about five minutes and will not go out unless you turn the bike off. It doesn't matter if the tank is full or not. Has anybody been able to fix this or is it something we will all have to live with. I go primarily by the mileage, but this darn light coming on expecially at night is disgusting. Any help would certainly be appreciated.
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  #2  
Old 10th December 2010
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Yeah I wish mine worked right, but its like the rest, I've had it come on after leaving home with what I though was a near full tank, worried, I pulled in at the next gas station and filled up with a total of 0.7 gal. ......
Then on my last ride about 3 weeks ago it came on at 118 mi. a good bit before I got home and I filled up at about 145 mi. and about 45 mi. from home with 10% ethanol which I don't like and didn't want to park with a tank full of... Maybe I can get a warm enough day to ride it out and refill with non ethanol...
Could I trade my light for a reserve please......
Have a good one...Tater...
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  #3  
Old 10th December 2010
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Was having the same glitch on mine. I pulled all the fuses, cleaned all the contacts in the fuse block & the blades on the fuses. Disconected the battery cables, both ends, & cleaned them as well. Used the dielectric grease on everything when I put it all back together & have not seen the problem since. My battery was also questionable & I replaced it at the same time. That was in September. No light until @ 140 miles now. I'm thinking the light is a bit sensetive to voltage level. If it's not up to par, it likes to come on to bug us & let us know there's something amiss, electrically.
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  #4  
Old 10th December 2010
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Thanks Brian and Tater for your help. I just had my battery connections off two weeks ago when I put on the Vance and Hines fuelpak, but I didn't put dielectic grease on the connections. I have pulled all the fuses in the past and cleaned the blades, but then again I did'nt put the grease on them. Think i'll do that. Thanks again fellows, stay warm ride safe.
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  #5  
Old 10th December 2010
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I have a 2010 Iron with the same problem. As of last weekend i had never had the battery cables off or done anything electrically to my bike. I thought the problem was an electrical issue so i checked all my connections were clean and i checked all the fuse blades.....it is still going on with my bike. Very,very frustrating to say the least. I'm not sure what the problem is,but,when i find it i will post with the results. If anyone else has any ideas about this problem,or had the same,please let me know. Thanks
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  #6  
Old 10th December 2010
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I also talked to the resident "genius" at my local harley shop and i may as well have talked to a deer....same look....big eyes in the headlights followed with a long uuuuuhhhhhhhhhhh.......:P
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  #7  
Old 10th December 2010
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Quote:
Originally Posted by BKB View Post
Used the dielectric grease on everything when I put it all back together & have not seen the problem since.
Not a bad hijack , but where in the h*** do you buy dielectric grease? Auto Parts Store? I asked at the radio controlled car / cell phone store (formerly known as radio shack) and the 11 year old salesperson (political correctness) looked at me like I was from another planet.

Frank
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  #8  
Old 10th December 2010
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You can find it at Lowes,Home Depot,or an electrical supply company if you have one in your area. I get mine at a local Wescott Hardware .
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  #9  
Old 10th December 2010
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Radio Shack should have it too, but your local HD dealer should have some if you can't find any.
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  #10  
Old 10th December 2010
stimbrell stimbrell is offline
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If this happens in cold weather, my Buell 1125R does this, I have been told the sensor works on temperature, when the petrol falls below the low fuel level the sensor is no longer sitting in the petrol and light comes on, if it is cold enough the petrol becomes cold enough to trigger the sensor and the low fuel light is on regardless of fuel level. With my Fuel in frame Buell the light goes off when the engine and exhaust heats the frame up enough to warm the petrol but that is not going to happen with a Sportster tank. Spoke to a guy with a V Rod the other day when it was close to freezing out and he said his did the same when it was cold.

Edit: Just read in the 1125 electrical diagnostic manual that as the fuel drops the sensor warms when no longer sitting in fuel and triggers the low fuel light, which would not support the above.

Last edited by stimbrell; 10th December 2010 at 19:15..
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