Running out of gas...
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RE: Running out of gas... - 4/20/2008 11:47:43 AM
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Jeff D.
Posts: 28
Joined: 4/21/2007
Status: offline
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quote:
.....have the external glass fuel filter.
.....I can turn the gas on and I see the gas fill up the fuel line on the way to the carb.
....the problem is that the fuel line will run out of gas and no other gas will pour into the fuel line which causes the bike to stall out and backfire like a shotgun through the exhaust. It will usually run for 5 - 10 minutes and then the fuel line gets empty. If I disconnect the fuel line to the carb gas pours out fine but for some reason it stops flowing when the carb is hooked up.
I just took the carb apart again this morning and cleaned it out and everything seems ok.. I am kind of lost on this one. Any ideas?? I had a similiar problem once. I'd run out of fuel going down the road(even when the throttle was not "opened up") but fuel always flowed through the fuel lines and filter when disconnected. I finally just replaced the petcock with a Pingel hi-flow type and only used the filter that came with it, not an inline type in the fuel line. No more fuel troubles!!!
I don't know what the problem was for sure, but suspect the slight restriction caused by the fuel filter, less than great flow from the stock petcock, and engine heat caused some type of vapor locking problem which stopped the flow when everything was connected.
Good Luck!!
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RE: Running out of gas... - 4/20/2008 12:44:27 PM
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Timboto
Posts: 57
Joined: 3/26/2007
Status: offline
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The right gas cap is vented and the left one is not.. when I remove the cap it doesn't change...
I also repalced the petcock last year... I was suspecting the fuel filter...
I'll try removing the filter and see if that help..
_____________________________
Ride to Eat, Eat to Ride
TimG
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RE: Running out of gas... - 4/20/2008 4:34:35 PM
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Timboto
Posts: 57
Joined: 3/26/2007
Status: offline
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Ok, I removed the filter and put in one fuel line directly to the carb... it is still backfiring out the exhaust like crazy when it is warmed up. It also does it through the carb when taking off...
Hmmmm...
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Ride to Eat, Eat to Ride
TimG
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RE: Running out of gas... - 4/20/2008 6:13:55 PM
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JohnB445
Posts: 263
Joined: 7/3/2007
Status: offline
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No comment that can help. But I have been watching since you
bought that Tim. It is looking good, when you get the wrinkles
ironed out. You will have a great old shovel. Keep at it.
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RE: Running out of gas... - 4/21/2008 6:38:51 AM
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Rodney
Posts: 689
Joined: 5/23/2007
From: Central Oregon
Status: offline
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hi there Timboto,
These guys are good! looking for the obvious fuel flow and venting the tank.
One thing I see by looking at the picture of your bike, is that the fuel line routed behind the rear head?
If so I don't think thats too good of an idea, it is getting more heat off that back cylinder than if routed between the front and rear cylinder and you would be able to eliminate several inches of fuel line making for better flow to the carburetor. This may not even be a problem but ya never know.
are you following the S & S instructions {original manual} for rebuilding and tuning the Carburetor?
popping out both the carb and pipes indicate you may have and ignition issue as well but take another look at the carburetor and make sure all is installed correctly with no vacuum leaks clear passages ect.
to confirm your getting a good supply of fuel to the carb you can have a container handy, remove the drain on the bottom of the float bowl, catch the fuel and then turn on the fuel valve and observe the volume of fuel flow.
does this bike have points?
valves set to specs?
fresh spark plugs?
float set to specs?
vent tube from float bowl installed?
battery fully charged?
keep us posted on your progress.
_____________________________
1968 FLH owned for 30 years
2002 FXSTDI
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RE: Running out of gas... - 4/21/2008 7:53:26 AM
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Rodney
Posts: 689
Joined: 5/23/2007
From: Central Oregon
Status: offline
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Tim you need to get yourself an OEM service manual and study it if you plan on working on your Shovel head.
the points or ignition module is behind the round inspection cover on the engine right side
fouled plugs can give you the condition you are describing but you need to determine IF they are fouled and WHY they are fouling!
BTW the link you posted doesn't work.
_____________________________
1968 FLH owned for 30 years
2002 FXSTDI
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RE: Running out of gas... - 4/21/2008 8:22:39 AM
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Timboto
Posts: 57
Joined: 3/26/2007
Status: offline
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I did purchase a manual last year but it is not the greatest and not very detailed. I believe it is the Clymer service manual..
I have never tried to look but I will look tonight... thanks!
I think they blocked the URL because it was from the V-twin forums... it described the exact same problem and they changed the coil and it fixed the problem.
_____________________________
Ride to Eat, Eat to Ride
TimG
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RE: Running out of gas... - 4/21/2008 9:04:38 AM
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Rodney
Posts: 689
Joined: 5/23/2007
From: Central Oregon
Status: offline
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The Clymer manual will give you some good tune up instructions. Use it to give you an idea of the basics of the different systems of the bike.
_____________________________
1968 FLH owned for 30 years
2002 FXSTDI
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RE: Running out of gas... - 4/21/2008 1:41:41 PM
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Timboto
Posts: 57
Joined: 3/26/2007
Status: offline
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Well, I do have electronic ignition, I looked at the manual at the HD dealer. I bought me a new Accell Coil, I figured it wouldnt' hurt to have it anyway even if that is not the main problem but I have a feeling it is. Most people i have talked to have said that is what it sounds like. I also got some SE plugs and wires.
I'll let you all know once they are put on tonight.
_____________________________
Ride to Eat, Eat to Ride
TimG
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RE: Running out of gas... - 4/21/2008 1:51:25 PM
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Rodney
Posts: 689
Joined: 5/23/2007
From: Central Oregon
Status: offline
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are you going to replace the points and condenser and set to specs?
I've been running the accel coil for years good choice IMO.
_____________________________
1968 FLH owned for 30 years
2002 FXSTDI
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