1988 gl1500 acts as if out of fuel when it's not


Information and questions on GL1500 Goldwings (1988-2000)
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cearleyma
Posts: 10
Joined: Fri Oct 30, 2009 8:31 pm
Location: Tulsa, Oklahoma
Motorcycle: 1988 GL1500 (Aspencade?)

1988 gl1500 acts as if out of fuel when it's not

Postby cearleyma » Sun May 23, 2010 8:12 pm



Hi,

I have a 1988 GL1500 with (aprox.) 72,800 miles. Yesterday, on a ride with freinds I filled up at our first rest stop & topped of my gas tank (just to be safe). Just after getting on the highway (aprox. 5 miles), I down shifted to pass a slow moving vehicle. I almost red-lined the tach as I passed this vehicle. Just as I got around him, the bike shut down as if running out of gas. After pulling off to the side of the road, I popped the gas cap & re-closed it. I applied full choke & the engine immediatly started slowly as if on 3-cylinders, then normall (all 6) when the choke was shut off.

It had done this before about 6-8 months ago. I then had changed 3 vaccumn lines on the carburetors. The bike has operated normally since then untill now.

Continuing on the ride & aprox. 108 miles later with 2 rest stops & only 113 miles on the tank of gas at highway speed the bike just shut down again as if it had run out of gas. I normally get between 140-170 miles on the highway before needing to fill up. After removing the gas cap & looking in the tank visually there was about 1/4 tank left, the fuel guage showed about 1/2 tank.

I pushed the bike to a gas station (pant-pant, huff-puff), filled it up with 3.25 gallons- so the guage was correct, the tank was not empty (about 6-gal capacity). After it set for (aprox.) 10 minutes, I applied full choke & hit the starter. It started slowly (on about 3-cylinders from the sound of the engine), I slid the choke off, & it idled normal on all cylinders.

I then proceeded to ride on the highway for 84 miles & the bike operated normally. I re-filled up, not wanting to drop below 100 miles on the tank. I continued on for another 47 miles & re-filled again just before getting home. The bike operates normally so long as I didn't go more than 100 miles on the tank. This is obviously unexeptable mode of operation.

It seems that something is not operating properly to allow the fuel-pump to pickup the "reserve" part of the tank (possibly?).

I intend to change the rest of the numerous remaining vaccumn lines soon, but does anyone have any idea if I might have a bigger or different problem? Or if I need to look at another area?--Thanks



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dingdong
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Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: 1988 gl1500 acts as if out of fuel when it's not

Postby dingdong » Mon May 24, 2010 9:12 am

First a question! Why are you using the choke after the initial start up?
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

dave2163
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Location: Stillwater, Ok
Motorcycle: 1998 HD RoadGlide

Re: 1988 gl1500 acts as if out of fuel when it's not

Postby dave2163 » Mon May 24, 2010 11:34 am

You might want to check the ignition system (especially the coil(s)) - make sure you're getting a spark to the plugs when it quits running. Doesn't really sound like fuel problem to me - but I'm just guessing.

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WingAdmin
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Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
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1998 XV250 Virago (sold)
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Re: 1988 gl1500 acts as if out of fuel when it's not

Postby WingAdmin » Mon May 24, 2010 1:21 pm

If it quits suddenly like you shut it off, I'd look at ignition. If it quits gradually like you're running out of gas, I'd look at fuel delivery - have you changed your fuel filter? Also check the fuel pump relay.

cearleyma
Posts: 10
Joined: Fri Oct 30, 2009 8:31 pm
Location: Tulsa, Oklahoma
Motorcycle: 1988 GL1500 (Aspencade?)

Re: 1988 gl1500 acts as if out of fuel when it's not

Postby cearleyma » Mon May 24, 2010 4:38 pm

As far as why do I use the choke while it's still warm?? Well, it works! Why it starts that way & not with it off, I'm not sure. :?:

Except for the one time I tried to pass that horse-trailer, the bike operates nomal. Then somewhere around 84-113 miles on the tank of gas, the engine sputters a little as if out of gas & then shuts down.

When I re-fuel the tank, it will start up within 5-10 minutes. This is not the 1st time this has happened. It happend about a year ago & I replaced the vaccumn line from the fuel petcock to a tee & the 2 lines off that tee to the carburetors. I thought this fixed it. But apparently not. It has acted fine untill now. :roll:

I went to the local honda dealership & spoke to the service people. They suggested pulling the fuel sending unit/fuel pump assembly, cleaning the fuel strainer, & checking the tank for any debris & contamination.

While I'm at it-I am going to replace all the remaining vaccumn lines, check the fuel petcock (per the service manual-this may be the culprit), as well as the fuel pump. I will have the ignition system checked (although I doubt this is my problem-after a refuel--it starts up) as well as the fuel relay.

We will see what happens!--Thanks for the feedback!!
Last edited by cearleyma on Tue May 25, 2010 5:02 pm, edited 1 time in total.

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dingdong
Posts: 2864
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Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500
2004 NRX1800 Rune

Re: 1988 gl1500 acts as if out of fuel when it's not

Postby dingdong » Tue May 25, 2010 7:51 am

You have a vacuum operated valve (petcock) just in front of the fuel filler cap. Sounds like you may have a problem with it.
Tom

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

cearleyma
Posts: 10
Joined: Fri Oct 30, 2009 8:31 pm
Location: Tulsa, Oklahoma
Motorcycle: 1988 GL1500 (Aspencade?)

Re: 1988 gl1500 acts as if out of fuel when it's not

Postby cearleyma » Mon Jul 26, 2010 6:23 pm

Well, It was the Fuel Petcock Assembly after all. I went & followed the proceedures lined out in the Honda Service manual & the test on that Petcock Assembly was 1st on the list. The manual said to use a vaccum guage & pull aprox. 8-psi of vaccum. It should of held for 30-seconds to 3 minutes. It didn't hold for a half second. When I applied vaccum you could hear the valve sucking air. So after $150.00 it is now fixed.

Thanks everyone!!!!

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rlsapp
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Re: 1988 gl1500 acts as if out of fuel when it's not

Postby rlsapp » Fri Jul 30, 2010 11:01 pm

hey you guys, thanks also for the info., I had the same thing happen to me for the first time about a week ago. I just had the carbs worked on at the Honda dealer, and got pi_ _ed off about giving them $400 for working on them, but the bike did set-up for awhile before having that done. Now I will look into this and hope it solves the problem...How do you do the test??? HUH?

cearleyma
Posts: 10
Joined: Fri Oct 30, 2009 8:31 pm
Location: Tulsa, Oklahoma
Motorcycle: 1988 GL1500 (Aspencade?)

Re: 1988 gl1500 acts as if out of fuel when it's not

Postby cearleyma » Sat Jul 31, 2010 11:49 am

Hi,
To do the test, go to any tool store & obtain a hand held vaccum guage. I got a brake vaccum tool ($25-$32 aprox. cost). It should have a guage on it that will go higher than 8-psi hg. vac. remove the vaccum line from the petcock assembly. Attach vaccum line from gauage to the petcock vaccum port. Squeeze handle repeatedly as necessary to obtain 7-8 psig hg. vaccum. It should hold vaccum for 3+ minutes. Be sure the vaccum line is tight & no leaks.

If it is good-remove guage vaccum line & reattach vaccum line from carburetor. The petcock assembly is ok!

If not-replace fuel pectcock assembly. OEM price can range from $125-$176 I found. It is a bit of a hassel to change, but it can be done.

Hope this helps.

cearleyma
Posts: 10
Joined: Fri Oct 30, 2009 8:31 pm
Location: Tulsa, Oklahoma
Motorcycle: 1988 GL1500 (Aspencade?)

Re: 1988 gl1500 acts as if out of fuel when it's not

Postby cearleyma » Sun Jan 09, 2011 12:55 pm

Hi again all,

Just one more update. Well after the bike sutting down on me one more time too often, decided to make sure it's fixed. I went to the local Honda service location, had the carbs completly overhauled, & also found that a "Butterfly Valve" was cracked & was the ultimate culprit. So it was a more expensive fix than I wanted, but it is fixed. The cool thing about it is the other day with the temperature at 17-degrees, it started up with just a tap on the starter. That is a real reasuring feeling.

Now if I can just get my broken front fender fixed.

later----------![/b]




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