Need Some Help
Tourer
Joined: Oct 2010
Posts: 411
Likes: 246
From: NW MO
I’ve also had this happen
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HDF Community Team
Joined: Jun 2006
Posts: 12,784
Likes: 2,612
From: san antonio
Please elaborate, which o-ring and how was it blocking fuel flow? The last and only thing done since the rebuild is the replacement of the lower o-ring in the quick disconnect tank valve last September; the original o-ring was leaking. I don't recall starting the bike since I replaced the o-ring so my first thought was I screwed up the o-ring replacement. I disconnected that line and some fuel leaked out and I could get fuel spray when depressng the plunger in the female/tank section of the valve. However, when reconnecting the supply line, it was very difficult to snap in the male end. Tried twice with no success, just wouldn't go all the way in but applied max pressure on the third go and it snapped in. In all the videos I have seen, it appears that the male fitting does not require maximum pressur to snap in to the tank valve. I don't know if that means anything but I don't think it should take max pressure to snap in the male side of the fitting.
EDIT: Relaced the lower o-ring in the tank quick disconnect; not the problem.
EDIT: Relaced the lower o-ring in the tank quick disconnect; not the problem.
Last edited by djl; Mar 2, 2025 at 03:37 PM.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,997
Likes: 8,065
From: poway
Me 3..
A test light won't find the problem.. If there are issues with electrical to the injectors, the ECU will declare an error.. If they are plugged, it won't..
A test light won't find the problem.. If there are issues with electrical to the injectors, the ECU will declare an error.. If they are plugged, it won't..
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HDF Community Team
Joined: Jun 2006
Posts: 12,784
Likes: 2,612
From: san antonio
Ok yea you need access to the injector connectors to plug a noid light to them to test. That could involve some work so your likely on the right track.
One other thing you might try is to remove the gas cap, turn the ing switch to run, ear to filler hole. Try to listen for fuel spraying around in the tank while the pump runs to prime the system Have ck'd a couple and actually saw fuel being sprayed. Pin holes in lines inside the tank. Probably Not does bike have a Security system ??
WP
One other thing you might try is to remove the gas cap, turn the ing switch to run, ear to filler hole. Try to listen for fuel spraying around in the tank while the pump runs to prime the system Have ck'd a couple and actually saw fuel being sprayed. Pin holes in lines inside the tank. Probably Not does bike have a Security system ??
WP
2005 FXSTD has a security system although I have never used it for anything; not even setting an alarm.
Another reason I don't suspect the injectors is that the OEMs were replace by the tuner less than 1000 miles back.
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HDF Community Team
Joined: Jun 2006
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Likes: 2,612
From: san antonio
Tourer
Joined: Oct 2010
Posts: 411
Likes: 246
From: NW MO
It’s been too long ago for me to recall specifics. But I had an oring problem that prevented getting the line connected properly and fuel would not pass through the fitting. It sounds to me like it could be your problem from how you describe what you did. Always look at the last thing you fixed, first.
FWIW the last time I had a leak there I used a green oring from an air conditioning service kit and it’s been working great for a couple years now.
FWIW the last time I had a leak there I used a green oring from an air conditioning service kit and it’s been working great for a couple years now.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,997
Likes: 8,065
From: poway
So if the injectors aren't pulsing, the ECM would throw a code? Check out my previous post about the quick disconnection at the tank; very difficult to snap back in. Hard to see inside the female end so not sure how to diagnose. Memory is poor but I thought I could see the lower o-ring when I replaced it but I don't see it now. However if it had been disloged, wouldn't the fitting leak?
The DTCs are P0261, P0262, P0263, P0264.
The thing is when there aren't any codes, it has to be fuel pressure to the injectors or them being plugged. The ECU doe not have any way to detect fuel pressure. The EFI system lacks pressure sensing.
You can try simply holding up on the fuel connector while trying to start.
I sure hope you have a pressure tester on order. IMO it's more important than a compression tester on EFI bikes.. It should be used any time the fuel system has been worked on to check for internal leaks.. I done work and had leaks afterwards.
Thread Starter
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HDF Community Team
Joined: Jun 2006
Posts: 12,784
Likes: 2,612
From: san antonio
It’s been too long ago for me to recall specifics. But I had an oring problem that prevented getting the line connected properly and fuel would not pass through the fitting. It sounds to me like it could be your problem from how you describe what you did. Always look at the last thing you fixed, first.
FWIW the last time I had a leak there I used a green oring from an air conditioning service kit and it’s been working great for a couple years now.
FWIW the last time I had a leak there I used a green oring from an air conditioning service kit and it’s been working great for a couple years now.
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Thread Starter
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HDF Community Team
Joined: Jun 2006
Posts: 12,784
Likes: 2,612
From: san antonio
You can try simply holding up on the fuel connector while trying to start. I sure hope you have a pressure tester on order. IMO it's more important than a compression tester on EFI bikes.. It should be used any time the fuel system has been worked on to check for internal leaks.. I done work and had leaks afterwards.
Question: Even though the pump is priming; fuel pressure could still be the issue? So if pulling the guts from the tank, replace fuel pump; filter; top plate gasket;regulator and all the connecting lines/clamps? Assuming all OEM replacements unless someone has acceptable aftermarket replacements.
I will be looking for tips/tricks; do'/dont's for the fuel system R/R. I have done the R/R on my old FLHT to adjust the float level but did not replace any components.
Last edited by djl; Mar 2, 2025 at 04:15 PM.
Seasoned HDF Member
Joined: Apr 2011
Posts: 6,186
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From: W. Texas
Tried twice with no success, just wouldn't go all the way in but applied max pressure on the third go and it snapped in. In all the videos I have seen, it appears that the male fitting does not require maximum pressur to snap in to the tank valve. I don't know if that means anything but I don't think it should take max pressure to snap in the male side of the fitting.
EDIT: Relaced the lower o-ring in the tank quick disconnect; not the problem.
EDIT: Relaced the lower o-ring in the tank quick disconnect; not the problem.
A number of times I have been fiddling with that connection with no luck.
One of the guys walks up ,gives it a try __ it's in SMH lol
WP