Fuel problem?
Seasoned HDF Member
Joined: Jan 2010
Posts: 7,369
Likes: 3,332
From: usa
If it's a pin hole in the fuel line . When the tank is very low on fuel , say the last 1/2 of Gal. When you turn on your start switch /**** ON you will hear a 2 to 3 sec sound of the fuel hising . This can also be seen with a flash light if look inside the tank . Also if it is the fuel line . When you make the repair put about 4" of the old hose over the new one with some sip ties were is rubs the tank.
Sip ties must be very very small to get though hole in tank .
Sip ties must be very very small to get though hole in tank .
Thread Starter
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Elite HDF Member
Joined: Mar 2008
Posts: 3,906
Likes: 145
From: SE Louisiana
Checked this AM. Only code was P0131, "Front O2 sensor low". Does that mean the sensor is bad?
Maybe I just lucked up? The front sensor is easily accessible to change without having to pull the exhaust.
Maybe I just lucked up? The front sensor is easily accessible to change without having to pull the exhaust.
Last edited by PPBART; Jul 4, 2016 at 10:38 AM.
Club Member
Joined: May 2007
Posts: 145,895
Likes: 821
From: 40 miles Northeast of Indy..
since I bought the bike new in 07 I've had two times when I had rough running..
1st time around 10K it was loose battery cables causing the miss, tightened them up and all was good till...
2nd time at 33K, it started cutting out, popping and loss of power at times.. It happened after about 90 miles of riding after filling up. I filled up again and then it ran fine for about another 90 miles and then it started doing the same..
Having read in here about the Pin hole in the gas line issue I figured that was what it was. Being over 500 miles from home I made to the closest HD dealer and they confirmed it (pin hole in gas line) indeed was the problem and I had them replace all the hose's and filter inside the tank.
5yrs later now and it's been Perfect since..
thinking -- if you got a Sensor code. it could be from lack of fuel caused by the Pin hole... If you have a good report with a Wrench at the dealership or a good Indy, I'd give them a call for a little talk before I started throwing $$$ at your bike fixing maybe what ain't broke..
.
1st time around 10K it was loose battery cables causing the miss, tightened them up and all was good till...
2nd time at 33K, it started cutting out, popping and loss of power at times.. It happened after about 90 miles of riding after filling up. I filled up again and then it ran fine for about another 90 miles and then it started doing the same..
Having read in here about the Pin hole in the gas line issue I figured that was what it was. Being over 500 miles from home I made to the closest HD dealer and they confirmed it (pin hole in gas line) indeed was the problem and I had them replace all the hose's and filter inside the tank.
5yrs later now and it's been Perfect since..
thinking -- if you got a Sensor code. it could be from lack of fuel caused by the Pin hole... If you have a good report with a Wrench at the dealership or a good Indy, I'd give them a call for a little talk before I started throwing $$$ at your bike fixing maybe what ain't broke..
.
Last edited by oct1949; Jul 4, 2016 at 12:26 PM. Reason: added
Thread Starter
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Elite HDF Member
Joined: Mar 2008
Posts: 3,906
Likes: 145
From: SE Louisiana
Just re-read your post and checked the bike -- there is definitely the 2-3 sec sound of hissing.
Thread Starter
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Elite HDF Member
Joined: Mar 2008
Posts: 3,906
Likes: 145
From: SE Louisiana
I think you could be right. The sound of fuel hissing when the switch is turned on seems pretty strong evidence.
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,309
Likes: 6,328
From: Honah Lee
Some thoughts before you spin a lot of wheels. The 2-3 second prime of the fuel system is from a timer is the System ECM relay. It's driven by a relay that you can hear click in, the fuel pump runs and then relay clicks off and pump stops. It charges the fuel rail with apx 62 ft lbs of pressure of gas so idle or WOT has more then enough. All excess over 62 is dumped back into tank since once running, the fuel pump runs all the time. ( ECM gets signal from crank position sensor input and after 20 inputs runs all the time) Loss of that or the bank angle sensor will kill pump for safety )
If you check the prime with the cap off in a quite dark garage with a flash light after bike sits for 24 hours to let pressure bleed off, usually, you will not here the hiss from the relief valve first test. So in my opinion, that would be the only time you can actually detect a bad line.
Once you check the first time and wait a few seconds and do it again, the pressure is 62 lbs and the second run of the fuel pump bleeds off and makes that hiss.
I have had a tank of bad gas that affected idle. It simple would not idle unless the throttle was opened. Obviously, was not too bad since after a few tanks of ethanol fuel absorbed the moisture and it started running OK. I spent two days checking however. It did not do what you say but if it is fuel running that bad, you should be able to siphon off the bottom and check for water. If it's water on bottom, it will not burn out. Tank needs enough ethanol (max 10% at a time) to absorb it or drained.
What is not stock on your motor?
If you check the prime with the cap off in a quite dark garage with a flash light after bike sits for 24 hours to let pressure bleed off, usually, you will not here the hiss from the relief valve first test. So in my opinion, that would be the only time you can actually detect a bad line.
Once you check the first time and wait a few seconds and do it again, the pressure is 62 lbs and the second run of the fuel pump bleeds off and makes that hiss.
I have had a tank of bad gas that affected idle. It simple would not idle unless the throttle was opened. Obviously, was not too bad since after a few tanks of ethanol fuel absorbed the moisture and it started running OK. I spent two days checking however. It did not do what you say but if it is fuel running that bad, you should be able to siphon off the bottom and check for water. If it's water on bottom, it will not burn out. Tank needs enough ethanol (max 10% at a time) to absorb it or drained.
What is not stock on your motor?
Last edited by Jackie Paper; Jul 4, 2016 at 01:05 PM.
Stellar HDF Member
Joined: Jan 2008
Posts: 3,036
Likes: 65
From: Earth
Same symptoms we had last week on my sons 06 Ultra. Turned out to be the fuel pressure regulator housing. One of the two ears on the regulator housing was cracked which allowed the pressure regulator to slip out of the housing. So much that you could see part of the o ring sticking out. The point is that it sounds as if you might have a loss of pressure in your line somewhere in the tank. The only way to really know for sure is to pull the pump assemble and inspect it. With the fact that are hearing the fuel hissing sound I would dive into the tanks and have a look see. Good luck. Let us know how it turns out.
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Thread Starter
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Elite HDF Member
Joined: Mar 2008
Posts: 3,906
Likes: 145
From: SE Louisiana
In your case, you just added 10% ethanol fuel until it absorbed the water? My first action was to siphon as much gas out as possible, then I filled with Exxon premium -- 4 gallons of 10% ethanol, so there was still about one gallon in the tank. I've only run it about 40 miles since, maybe not enough to make any difference.
Motor is Stage 1, otherwise factory stock.
Last edited by PPBART; Jul 4, 2016 at 06:13 PM.
