Running poorly, sputtering backfiring thru intake
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Intermediate
Joined: May 2020
Posts: 44
Likes: 10
From: Sun City West, AZ
Running poorly, sputtering backfiring thru intake
Hi Folks,
Having a problem. Bike starts, idles, but when you try to give it throttle it breaks up spits backfires and has no power. When you try to put any kind of load on it it just dies. This started on a ride on Friday and was mild at first but got progressively worse the farther I went and ended with an expensive ride home on a flatbed tow truck
I've been doing some reading and the symptoms sound similar to those when the fuel hose in the tank gets a hole in it. Bike is a 2011 FLHTK with103 engine with 16K on it. The only symptom I don't seem to have is the fuel spray in the tank. When I turn on the ignition/run, the fuel pump runs and then shuts off, which I believe is normal. I looked into the tank with a flashlight during the fuel pump cycle and did not see any fuel spray or mist.
I retrieved the following DTCs from the Bike with my PV
P0131 Front O2 sensor low (Lean)
P0151 Rear O2 Sensor Low (Lean)
P0502 VSS High/Open EFI
P1353 Front Cylinder no combustion EFI
P1356 Rear Cylinder No Combustion EFI
I also have the following DTCs but I don't think they are related but thought I'd list the anyway just in case. I know what is causing the TSSM so I think we can ignore those
TSSM B1121 Left Turn Fault
TSSM B1122 Right Turn Fault
TSSM U1301 Serial Data Open/High EFI
U1301 Tachometer Serial Data Open/High EFI
Also U1040 and U1016
Any suggestions of things I should be checking would be greatly appreciated
Having a problem. Bike starts, idles, but when you try to give it throttle it breaks up spits backfires and has no power. When you try to put any kind of load on it it just dies. This started on a ride on Friday and was mild at first but got progressively worse the farther I went and ended with an expensive ride home on a flatbed tow truck
I've been doing some reading and the symptoms sound similar to those when the fuel hose in the tank gets a hole in it. Bike is a 2011 FLHTK with103 engine with 16K on it. The only symptom I don't seem to have is the fuel spray in the tank. When I turn on the ignition/run, the fuel pump runs and then shuts off, which I believe is normal. I looked into the tank with a flashlight during the fuel pump cycle and did not see any fuel spray or mist.
I retrieved the following DTCs from the Bike with my PV
P0131 Front O2 sensor low (Lean)
P0151 Rear O2 Sensor Low (Lean)
P0502 VSS High/Open EFI
P1353 Front Cylinder no combustion EFI
P1356 Rear Cylinder No Combustion EFI
I also have the following DTCs but I don't think they are related but thought I'd list the anyway just in case. I know what is causing the TSSM so I think we can ignore those
TSSM B1121 Left Turn Fault
TSSM B1122 Right Turn Fault
TSSM U1301 Serial Data Open/High EFI
U1301 Tachometer Serial Data Open/High EFI
Also U1040 and U1016
Any suggestions of things I should be checking would be greatly appreciated
Last edited by jjsinaz; Oct 4, 2020 at 06:44 PM. Reason: Added to
Seasoned HDF Member
Joined: Jul 2008
Posts: 9,282
Likes: 1,139
From: southeast PA
Do a fuel pressure test to make sure you don't have an internal leak. If a hose is leaking from its underside and there's too much gas in the tank you might not be able to see it.
Often when there's a lot of electrical codes it's a good idea to start with the battery cables. Check the terminal connections and especially the ground connection to the frame.
Often when there's a lot of electrical codes it's a good idea to start with the battery cables. Check the terminal connections and especially the ground connection to the frame.
Last edited by nevil; Oct 5, 2020 at 11:53 AM.
Thread Starter
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Intermediate
Joined: May 2020
Posts: 44
Likes: 10
From: Sun City West, AZ
Thanks nevil. I did check the battery connections and cleaned/tightened them. I'll have to take a look at the ground connection at the frame. I'll have to hunt for it cuz I have no idea where it; at.
I drained about half the fuel out of the tank before I checked for the fuel spray and still did not see anything. Tried to take the fuel filter out but did not have any luck getting it out and I didn't want to break anything. Looks like a real pain to get anything in an out of those newer tanks with just the round hole on them. Didn't seem to find any good you tube vids that showed how to do it either.
I think I'm going to take it somewhere and let somebody who has the tools and knows how work on it. The question is where.
I drained about half the fuel out of the tank before I checked for the fuel spray and still did not see anything. Tried to take the fuel filter out but did not have any luck getting it out and I didn't want to break anything. Looks like a real pain to get anything in an out of those newer tanks with just the round hole on them. Didn't seem to find any good you tube vids that showed how to do it either.
I think I'm going to take it somewhere and let somebody who has the tools and knows how work on it. The question is where.
Thread Starter
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Intermediate
Joined: May 2020
Posts: 44
Likes: 10
From: Sun City West, AZ
The PV was not attached to the bike when this happened. The harness for it was and I disconnected it just to be sure it wasn't causing the problem. I did flash the tune that fuel moto provided whenever I got the PV and the bike had been running good since I did that.
Do you think I should try flashing the old tune back into the ECM?
Do you think I should try flashing the old tune back into the ECM?
The PV was not attached to the bike when this happened. The harness for it was and I disconnected it just to be sure it wasn't causing the problem. I did flash the tune that fuel moto provided whenever I got the PV and the bike had been running good since I did that.
Do you think I should try flashing the old tune back into the ECM?
Do you think I should try flashing the old tune back into the ECM?
Thread Starter
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Intermediate
Joined: May 2020
Posts: 44
Likes: 10
From: Sun City West, AZ
Update: Turned out to be a bad O ring on the fuel filter in the tank. The indy who fixed it for me said it looked like the O ring was damaged when someone changed the fuel filter.
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Thread Starter
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Intermediate
Joined: May 2020
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From: Sun City West, AZ
Thought I'd give you guys an update on this issue. After the indy fixed the bad o-ring on the fuel filter, I was riding one day and it started to cut out again. Pulled off to the side and shut her down. Started back up fine and rode the rest of the way home (about 30 miles) and it ran fine. Since then, (a few months) it has run flawlessly, except for 2 Sundays ago . I had ridden to church and when I went to leave, started up and ran for about 100 feet and stalled and would not start. I determined that the fuel pump was not priming. Had to have her towed home again. This time I decided to fix it myself. After determining that the fuel pump was getting power, I pulled the tank off and took it apart and found that the strainer on the bottom of the fuel pump had disintegrated and that $hit was all through the fuel system. I suspect that a larger piece of that stuff found its way into the pump and jammed it. Replaced the fuel pump. pressure regulator and fuel filter. Now running fine again.
My theory as to what happened on the ride after the indy had fixed it is that a piece of that strainer got sucked up on to the fuel pump inlet and starved it for fuel, then when I shut it off the piece fell off and it ran fine again (although I am surprised it too so long for the problem to present itself again).
My message to those of you who have bikes that are 8-10 years old is that it might be a good idea to have that fuel pump strainer checked/replaced before you end up on the side of the road. Hope this is helpful.
Keep the shiny side up!
My theory as to what happened on the ride after the indy had fixed it is that a piece of that strainer got sucked up on to the fuel pump inlet and starved it for fuel, then when I shut it off the piece fell off and it ran fine again (although I am surprised it too so long for the problem to present itself again).
My message to those of you who have bikes that are 8-10 years old is that it might be a good idea to have that fuel pump strainer checked/replaced before you end up on the side of the road. Hope this is helpful.
Keep the shiny side up!
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Stage III
Joined: Oct 2021
Posts: 3
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From: FL
Thought I'd give you guys an update on this issue. After the indy fixed the bad o-ring on the fuel filter, I was riding one day and it started to cut out again. Pulled off to the side and shut her down. Started back up fine and rode the rest of the way home (about 30 miles) and it ran fine. Since then, (a few months) it has run flawlessly, except for 2 Sundays ago . I had ridden to church and when I went to leave, started up and ran for about 100 feet and stalled and would not start. I determined that the fuel pump was not priming. Had to have her towed home again. This time I decided to fix it myself. After determining that the fuel pump was getting power, I pulled the tank off and took it apart and found that the strainer on the bottom of the fuel pump had disintegrated and that $hit was all through the fuel system. I suspect that a larger piece of that stuff found its way into the pump and jammed it. Replaced the fuel pump. pressure regulator and fuel filter. Now running fine again.
My theory as to what happened on the ride after the indy had fixed it is that a piece of that strainer got sucked up on to the fuel pump inlet and starved it for fuel, then when I shut it off the piece fell off and it ran fine again (although I am surprised it too so long for the problem to present itself again).
My message to those of you who have bikes that are 8-10 years old is that it might be a good idea to have that fuel pump strainer checked/replaced before you end up on the side of the road. Hope this is helpful.
Keep the shiny side up!
My theory as to what happened on the ride after the indy had fixed it is that a piece of that strainer got sucked up on to the fuel pump inlet and starved it for fuel, then when I shut it off the piece fell off and it ran fine again (although I am surprised it too so long for the problem to present itself again).
My message to those of you who have bikes that are 8-10 years old is that it might be a good idea to have that fuel pump strainer checked/replaced before you end up on the side of the road. Hope this is helpful.
Keep the shiny side up!
Now my codes are:
P1353 Front Cylinder No Combustion,
P0373 CKP Sensor Intermittent &
P0131 Front Oxygen Sensor Low.
Previous codes:
P0131 Front 02 sensor low (lean),
P0132 Engine running rich,
P0134 Front 02 sensor open/not responding,
P0151 Rear 02 sensor low (lean),
P0152 Rear 02 sensor high (rich) &
P1353 Front Cylinder No Combustion EFI.
I wrote down the codes prior to that but can't locate them.
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srjohnson
Ignition/Tuner/ECM/Fuel Injection
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Jan 30, 2014 11:34 PM