Fuel range off after tank upgrade!?
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Tourer
Joined: Sep 2022
Posts: 439
Likes: 73
From: Ireland
Yeah, if you're using the 5-gallon tank with a 5-gallon gauge from a Fat Boy, then it should definitely be working together so I can only assume that the problem is the 3.6-gallon fuel sender from the Fat Bob's fuel pump.
All my comments prior were assuming that you were using the Fat Bob's fuel gauge. Using the Fat Boy's is a whole different thing.
A new 5-gallon fuel pump assembly with sender is probably the answer to the problem, but please do keep us posted on what they say.
All my comments prior were assuming that you were using the Fat Bob's fuel gauge. Using the Fat Boy's is a whole different thing.
A new 5-gallon fuel pump assembly with sender is probably the answer to the problem, but please do keep us posted on what they say.
Grand HDF Member
Joined: Nov 2017
Posts: 4,252
Likes: 3,135
From: Texas
Okay, looking forward to the results!
Thread Starter
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Tourer
Joined: Sep 2022
Posts: 439
Likes: 73
From: Ireland
Yeah, if you're using the 5-gallon tank with a 5-gallon gauge from a Fat Boy, then it should definitely be working together so I can only assume that the problem is the 3.6-gallon fuel sender from the Fat Bob's fuel pump.
All my comments prior were assuming that you were using the Fat Bob's fuel gauge. Using the Fat Boy's is a whole different thing.
A new 5-gallon fuel pump assembly with sender is probably the answer to the problem, but please do keep us posted on what they say.
All my comments prior were assuming that you were using the Fat Bob's fuel gauge. Using the Fat Boy's is a whole different thing.
A new 5-gallon fuel pump assembly with sender is probably the answer to the problem, but please do keep us posted on what they say.
The part numbers for the fuel pump AND sender are different.t from 2022 to 2023 and the fuel tank is a different number also.At least the 5 gallon tank/pump and sender from a Fat Boy 5 gallon tank.Do you have any idea why?
Grand HDF Member
Joined: Nov 2017
Posts: 4,252
Likes: 3,135
From: Texas
Sorry, no. My bike is a 2018 and I got a new pump/sender combo when I did the swap.
The part numbers are different for 2022 and 2023? Wonder what changed?
Only thing I can think of is you should try to have a matching set of fuel gauge and fuel level sender, meaning both from the same model year. I really doubt that would be the problem but can't think of what else it could be.
Have you tried a different pump/sender? Maybe yours is just defective?
The part numbers are different for 2022 and 2023? Wonder what changed?
Only thing I can think of is you should try to have a matching set of fuel gauge and fuel level sender, meaning both from the same model year. I really doubt that would be the problem but can't think of what else it could be.
Have you tried a different pump/sender? Maybe yours is just defective?
Thread Starter
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Tourer
Joined: Sep 2022
Posts: 439
Likes: 73
From: Ireland
Sorry, no. My bike is a 2018 and I got a new pump/sender combo when I did the swap.
The part numbers are different for 2022 and 2023? Wonder what changed?
Only thing I can think of is you should try to have a matching set of fuel gauge and fuel level sender, meaning both from the same model year. I really doubt that would be the problem but can't think of what else it could be.
Have you tried a different pump/sender? Maybe yours is just defective?
The part numbers are different for 2022 and 2023? Wonder what changed?
Only thing I can think of is you should try to have a matching set of fuel gauge and fuel level sender, meaning both from the same model year. I really doubt that would be the problem but can't think of what else it could be.
Have you tried a different pump/sender? Maybe yours is just defective?
You said your 'bars remaining' are correct but mine are not so that tells me my sender sensor is defo not optimul to say the least.
My tank was ordered last year so I'm guessing mine is a 2023 tank.
2022 Sender 61200056
2022 Pump 61200042
2022 Tank61000674
2023 Sender61200099
2023 Pump61200093
2023 Tank61000858
There's also this 61200100 which is a 2023 Fuel Regulator.
Not sure what the regulator is.Any idea if that plays into it?
Grand HDF Member
Joined: Nov 2017
Posts: 4,252
Likes: 3,135
From: Texas
I wouldn't expect the regulator to affect the fuel level reading...
Wild that the part numbers changed. The question is do your instrument cluster and fuel pump and sender all match years?
Swapping the tank would only work if your fuel gauge/instrument cluster isn't mounted on the tank, right? The goal is to get a known good pump/sender combo to output a known good signal to your instrument cluster, and vice versa. That would be a much more difficult task if the gauge is mounted on the tank, like mine is, so it may be a little extra work but at this point it seems necessary.
Good luck!
Wild that the part numbers changed. The question is do your instrument cluster and fuel pump and sender all match years?
Swapping the tank would only work if your fuel gauge/instrument cluster isn't mounted on the tank, right? The goal is to get a known good pump/sender combo to output a known good signal to your instrument cluster, and vice versa. That would be a much more difficult task if the gauge is mounted on the tank, like mine is, so it may be a little extra work but at this point it seems necessary.
Good luck!
Grand HDF Member
Joined: Nov 2017
Posts: 4,252
Likes: 3,135
From: Texas
Actually, just thought of something that may or may not come into play. If you plug his console into your bike, it's possible that it might try to reconcile the odometer between the speedometer's stored odometer reading, and your ECU's stored odometer reading. I'm not an expert on this but the way I understand it, if the odometer readings are different, the bike will choose whichever is higher and update the ECU and the speedometer to both have the higher reading.
Not sure if it will happen from a simple test, or if it needs to be connected for a certain number of miles or a certain amount of time or whatever. But I think the risk exists so you want to get the straight information from someone who definitely knows the procedure. (Of course, if your bike and his have the same # of miles on them, then it's not such a big deal, but if you have 40,000 on yours and he has 1100 on his, he might not be very happy if his bike suddenly registers as having 40,000 miles on it!)
Not sure if it will happen from a simple test, or if it needs to be connected for a certain number of miles or a certain amount of time or whatever. But I think the risk exists so you want to get the straight information from someone who definitely knows the procedure. (Of course, if your bike and his have the same # of miles on them, then it's not such a big deal, but if you have 40,000 on yours and he has 1100 on his, he might not be very happy if his bike suddenly registers as having 40,000 miles on it!)
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Thread Starter
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Tourer
Joined: Sep 2022
Posts: 439
Likes: 73
From: Ireland
[QUOTE=FatBob2018;21619727]Actually, just thought of something that may or may not come into play. If you plug his console into your bike, it's possible that it might try to reconcile the odometer between the speedometer's stored odometer reading, and your ECU's stored odometer reading. I'm not an expert on this but the way I understand it, if the odometer readings are different, the bike will choose whichever is higher and update the ECU and the speedometer to both have the higher reading.
Not sure if it will happen from a simple test, or if it needs to be connected for a certain number of miles or a certain amount of time or whatever. But I think the risk exists so you want to get the straight information from someone who definitely knows the procedure. (Of course, if your bike and his have the same # of miles on them, then it's not such a big deal, but if you have 40,000 on yours and he has 1100 on his, he might not be very happy if his bike suddenly registers as having 40,000 miles on it!)[/QUOTE
My tank and gauge came from the same dealer and bought in 2023 so id guess i have the updated parts there.
On the mileage thing i thought if its a new bike that i test a tank from lets say then I'm not sure tbh.Change of thought there.I need to ask a dealer about that.I could always use my own gauge with the appropriate tank/pump and sender combo.Which would probably be the best way to go anyway as my own gauge would be what's ends up on my bike anyway.
Not sure if it will happen from a simple test, or if it needs to be connected for a certain number of miles or a certain amount of time or whatever. But I think the risk exists so you want to get the straight information from someone who definitely knows the procedure. (Of course, if your bike and his have the same # of miles on them, then it's not such a big deal, but if you have 40,000 on yours and he has 1100 on his, he might not be very happy if his bike suddenly registers as having 40,000 miles on it!)[/QUOTE
My tank and gauge came from the same dealer and bought in 2023 so id guess i have the updated parts there.
On the mileage thing i thought if its a new bike that i test a tank from lets say then I'm not sure tbh.Change of thought there.I need to ask a dealer about that.I could always use my own gauge with the appropriate tank/pump and sender combo.Which would probably be the best way to go anyway as my own gauge would be what's ends up on my bike anyway.
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