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cogenguy
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« on: July 12, 2020, 04:19:32 PM » |
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My bike was sputtering and dying after filling up and I solved that problem by keeping the fuel cover off until I was ready to go. Now that it is hot in Bakersfield it was doing it at 100 miles on the tank. I would have to wait about 10 minutes and then it would restart. After a couple of miles it would do it again. This happened on the way to work but going home in the morning when it was cooler I had no problems. I still had plenty of fuel when this happened. I replaced vacuum lines and rebuild the fuel valve but it still happens. Doing a desmog tomorrow. Does anyone have any recommendations as to if this could be related to the ignition system also. Thank you.
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Hook#3287
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« Reply #1 on: July 12, 2020, 04:27:19 PM » |
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Have you checked the vent line going from the back bottom of the tank, behind the center cover to the rear bottom of the engine?
If that line is pinched, it will stop gas flow.
It is also a drain line for gas overflow from the tank cap area. You should check that the line is not plugged somewhere from the cap area to the rear tank nipple.
Do you have a inline fuel filter?
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gordonv
Member
Posts: 5760
VRCC # 31419
Richmond BC
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« Reply #2 on: July 12, 2020, 06:32:30 PM » |
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+1 Did you have the tank off recently? My bike was sputtering and dying after filling up and I solved that problem by keeping the fuel cover off until I was ready to go. Now that it is hot in Bakersfield it was doing it at 100 miles on the tank. I would have to wait about 10 minutes and then it would restart. After a couple of miles it would do it again.
I don't really understand the whole write up. You opened the cap and the bike ran fine. At idle? "it was doing it at 100 miles on the tank" I don't understand the above statement. If the bike ran when the cap was open, how did you hold it open? Just breaking the cap seal with something, like a stir stick/zap strap, which will allow air to get in, stopping what sounds like a vacuum lock you are having on the tank, usually due to the air vent under the tank being pinch. |
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1999 Black with custom paint IS   |
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cogenguy
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« Reply #3 on: July 13, 2020, 03:54:37 PM » |
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The vent line from the tank is fine and I have no inline filter. I would fill up and then close the tank lid just before starting, just letting it breath. The bike was dying after filling up and riding 100 miles on it. I have had the tank off recently and checked to make sure vent line went straight down to the charcoal canister. I also found after removing the carb. assy that there are 6 small vacuum lines on each carb. about 2-3 inches long. I have replaced those also. Desmog tomorrow. Just wanted to know if this could have anything to do with the ignition system.
Thank you
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Bighead
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« Reply #4 on: July 13, 2020, 04:21:03 PM » |
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No not an ignition problem as stated before you have a plugged or pinched vent line.
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1997 Bumble Bee
1999 Interstate (sold)
2016 Wing
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Chrisj CMA
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« Reply #5 on: July 13, 2020, 05:57:12 PM » |
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One of my Valkyries did that when it had that dumb quick release where it loops around. Valkyries also do that when the petcock is going bad. This is what I suspect. I know, I know you rebuilt it. Been there done that. I think you have a bad petcock
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Hook#3287
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« Reply #6 on: July 13, 2020, 06:04:02 PM » |
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I have had the tank off recently and checked to make sure vent line went straight down to the charcoal canister. This I question. |
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gordonv
Member
Posts: 5760
VRCC # 31419
Richmond BC
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« Reply #8 on: July 13, 2020, 06:26:16 PM » |
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With the canister it would be. Maybe missing the T on the hose going down. There you go, there should be a T on the vent line after it starts going down, half way to the ground. It's an air break for if water gets into the vent hose in the rain. |
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1999 Black with custom paint IS |
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indybobm
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« Reply #9 on: July 13, 2020, 07:47:12 PM » |
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The tee in the vent line is only needed when riding in the rain when the bottom of the vent line can suck up water. In dry conditions, the absence of the tee would not cause a problem. Even on a California Call the line would not be connected to the cannisters.
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So many roads, so little time
VRCC # 5258
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CoreyP
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« Reply #10 on: July 13, 2020, 09:14:26 PM » |
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Get rid of the canister, they can fill up with fuel and cause problems or at least on a car they can. If you are going to desmog you certainly aren't going for eco-friendly. You don't need the charcoal canister.
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cogenguy
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« Reply #11 on: July 13, 2020, 09:37:18 PM » |
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There is no tee on the tank vent line, one piece line connecting to the canister.
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RonW
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« Reply #12 on: July 14, 2020, 03:11:48 AM » |
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You might check if No.2 isn't kinked. The end of No.2 is clipped on to the kickstand bracket on my tourer.  *edit * |
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« Last Edit: July 14, 2020, 04:30:47 AM by RonW »
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2000 Valkyrie Tourer
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Hook#3287
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« Reply #13 on: July 14, 2020, 03:43:15 AM » |
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https://www.partzilla.com/catalog/honda/motorcycle/1999/gl1500ct-ac-valkyrie-tourer/fuel-tankAbove is a cali tourer tank diagram. The vent hose should not be hooked to a canister, it should have a"T". I have zero experience with a cali model. Never even seen one. (Well, maybe at Inzane) But ALL Valks have the same vent line from the tank to daylight through a "T". Unless it's #1 in the diagram posted by Ronw. That sure is a lot of extra hose to deal with. Test the canister for air flow.
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« Last Edit: July 14, 2020, 03:54:22 AM by Hook#3287 »
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RonW
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« Reply #14 on: July 14, 2020, 04:36:28 AM » |
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Oh, I assumed CoreyP had a cali model.
That sure is a lot of extra hose to deal with.
Agreed, also there's 2 valves (circled) that are part and parcel if you were to desmog.  |
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2000 Valkyrie Tourer
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9Ball
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« Reply #15 on: July 14, 2020, 04:40:17 AM » |
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Attach an extra length of vent hose and try blowing through the hose to verify it isn’t plugged inside the tank. You should have minimal resistance if it is clear and not kinked.
Check the easy stuff first.
Good luck.
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« Last Edit: July 14, 2020, 04:43:50 AM by 9Ball »
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VRCC #6897, Joined May, 2000
1999 Standard
2007 Rocket 3
2005 VTX 1300S
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gordonv
Member
Posts: 5760
VRCC # 31419
Richmond BC
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« Reply #16 on: July 14, 2020, 07:07:21 AM » |
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+1
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1999 Black with custom paint IS |
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cogenguy
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« Reply #17 on: July 14, 2020, 08:05:24 AM » |
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I appreciate all of your help. I have checked for blockage on the tank vent line and also for flow through the canister and it all checks out good. Not sure what else it could be. Has anyone changed out the small vacuum hose in between each carb. that is a couple of inches long?
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Bighead
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« Reply #18 on: July 14, 2020, 09:59:18 AM » |
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I appreciate all of your help. I have checked for blockage on the tank vent line and also for flow through the canister and it all checks out good. Not sure what else it could be. Has anyone changed out the small vacuum hose in between each carb. that is a couple of inches long?
If all vents are clear I would go with Jeff. Petcock failing. |
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1997 Bumble Bee
1999 Interstate (sold)
2016 Wing
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cogenguy
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« Reply #19 on: July 14, 2020, 01:53:10 PM » |
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I have already rebuild the petcock with a new cover set. Putting everything back on and getting ready to test out bike.
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Jims99
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« Reply #20 on: July 14, 2020, 07:31:45 PM » |
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Make sure you have good flow from petcock even under half tank. Also no external fuel filter and straight fuel line. If it dips down it can get air that will slow fuel flow.
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The light at the end of the tunnel, is a train.
99 tourer
00 interstate
97 standard
91 wing
78 trail 70
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Chrisj CMA
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« Reply #21 on: July 14, 2020, 07:41:59 PM » |
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I have already rebuild the petcock with a new cover set. Putting everything back on and getting ready to test out bike.
New cover set is not a guarantee of proper function. |
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Lyle Laun
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« Reply #22 on: July 14, 2020, 08:17:01 PM » |
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I would suggest to Replace the Honda petcock with a Pingel manual valve.
Lyle.....
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Get out & Ride !!
97 Red/White Standard dressed as Tourer
98 Black "Rat Rod" Standard
99 Green/Silver Interstate
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cogenguy
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« Reply #23 on: July 15, 2020, 08:59:17 PM » |
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I replaced all vacuum tubing and all other lines, installed carbs. All parts replaced and filled up extended fuel line to test bike without the airbox on. It started fine with the choke closed but died if I opened it back up. I am assuming the the longer throttle cable wraps around from the back and the other one goes over the top and attaches to the carbs. When routing the throttle cables do they stay on the inside of the frame.? If anyone has pictures this would be extremely helpful. I should have taken more pics before disassembly. Also I am having a hard time getting the front 2 airtubes from the airbox to match up to the carbs. All help will be greatly appreciated.
Thank you for all help.
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Bighead
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« Reply #24 on: July 16, 2020, 12:15:25 AM » |
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I see where you state you extended ( made longer?) the fuel line? If so there is your problem. The line needs to be the same length and always going down hill. If it has slack fuel will not flow properly. I may run fine on a full tank but when fuel level drops the pressure from the tank will drop and cause the problem you describe.
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1997 Bumble Bee
1999 Interstate (sold)
2016 Wing
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cogenguy
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« Reply #25 on: July 16, 2020, 12:32:42 AM » |
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I just was using the longer fuel line to fill the carbs to start the bike before making up final connection to tank.
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rilling
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« Reply #26 on: July 16, 2020, 01:54:19 AM » |
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A few weeks ago i had to rebuild the fuel petcock of my 97 tourer, because it did not shut off properly.
I used a cheap rebuild set for the vacuum side.
Result: Yes, it shut off properly then in the off position, but it did not open properly. No problems at low speed, but at full throttle it ran out of fuel after about 1,5 miles (here in germany we have some roads with no speed limit.....).
So i replaced the petcock by a CBR 600 F4 one, it is just the same, but without the vacuum side.
Now it works perfect.
What was the problem with the rebuild set: The new spring was a little bit longer and the vacuum side did not open wide enough, no problem at idle and low speed, but not enough fuel for real power.
Maybe you should try a different petcock?
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« Last Edit: July 16, 2020, 01:56:38 AM by rilling »
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RonW
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« Reply #27 on: July 16, 2020, 02:54:10 AM » |
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..... i replaced the petcock by a CBR 600 F4 one, it is just the same, but without the vacuum side.
Now it works perfect.
That's definitely a way to eliminate the vacuum assist!! Never heard of the solution. Awesome! What is the product number?
What was the problem with the rebuild set: The new spring was a little bit longer and the vacuum side did not open wide enough, no problem at idle and low speed, but not enough fuel for real power.
Maybe you should try a different petcock?
Thanks for the debrief. |
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2000 Valkyrie Tourer
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rilling
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« Reply #28 on: July 16, 2020, 03:31:00 AM » |
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cogenguy
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« Reply #29 on: July 27, 2020, 12:28:56 AM » |
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Back on the road again. Performed a full desmog. Now bike is running like it should, no problems. Thanks for all the help.
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Bighead
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« Reply #30 on: July 27, 2020, 03:46:40 AM » |
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Had to be more than smogg set up that made it not run.
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1997 Bumble Bee
1999 Interstate (sold)
2016 Wing
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Simmy74
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« Reply #31 on: August 12, 2020, 10:00:32 PM » |
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FWIW-
I had very similar symptoms on mine and eventually found the fuel filter "straw" inside the tank contrains a rubber/plastic collar at the halfway point, and this had dislodged and rotated in the straw and obstructing flow down to the petcock.
When you rebuild or replace the petcock, remove the plastic filter and take a look.
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Guns don't kill people. Drivers with cellphones do.
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The emperor has no clothes
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« Reply #32 on: August 12, 2020, 10:05:01 PM » |
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FWIW-
I had very similar symptoms on mine and eventually found the fuel filter "straw" inside the tank contrains a rubber/plastic collar at the halfway point, and this had dislodged and rotated in the straw and obstructing flow down to the petcock.
When you rebuild or replace the petcock, remove the plastic filter and take a look.
It's probably a good idea to replace the filter and rubber collar after a decade or so. |
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