Stalling Problem 88 GW 1500/6


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mgatortpd
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Stalling Problem 88 GW 1500/6

Postby mgatortpd » Fri Jul 27, 2012 8:44 am



Hello folks, just bought my first Honda GW 1500/6, 74,000 miles, excellent shape. Took it out for a ride (only 2nd day) and while in 4th gear, the engine seemed to want to bogg down and try to stall. Fuel tank line was at quarter tank, so stopped and got gas. Continued down the road and it started again after about 3 miles, almost as if it was starving for fuel(?), the choke was OFF, the tank was full, hmmmm...was able to limp it home. Engine would stall, but then it would start with no problem. I looked inside fuel tank, did not see any debries, so I am thinking fuel filter, fuel pump, fuel something? I am not a meachanic by any means, but I am not afraid to try a simple fix if not to complicated. Any suggestions would be a big help, thank you in advance!



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virgilmobile
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Re: Stalling Problem 88 GW 1500/6

Postby virgilmobile » Fri Jul 27, 2012 9:54 am

Fuel starvation.....It may be a trial and error thing.
There are a few tests that you can do and some things you can just assume.

As you drive,more fuel is being demanded from the tank.If the filter is near plugged up,it will cause this problem.It can just be replaced.

2nd.It's possible that the vacuum fuel shutoff valve is not working well.It sets right in front of the fuel cap.It can be tested.
There is a vacuum line that goes from it to the right hand intake runner.That vacuum hose can deteriorate and collapse.Usually right at the runner and in it's 90* bend.
If this happens,the valve simply closes off and starves the carbs of fuel.
Pull a vacuum test on the valve to see if it holds a vacuum and the diaphragm is OK.

3rd..the fuel pump..I've heard of a few that become so warn out that they start to drag and slow down.The pump can be tested in the bike.Get the info on pressure and flow and test it.
Replacement pumps are outrageous in price,but I think there is one used in a car that will work in place of it that's much cheaper.It's a in tank 4psi pump.You may have to Google for more details.

Look in the "manuals" section and download the 88-89 euro service manual.It covers all this stuff.

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mgatortpd
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Re: Stalling Problem 88 GW 1500/6

Postby mgatortpd » Fri Jul 27, 2012 10:30 am

Thank you for the quick reply! I will try what you recommend. Appreicate the info!

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Re: Stalling Problem 88 GW 1500/6

Postby robb » Fri Jul 27, 2012 11:19 am

You did not say how long the bike sat before you bought it, could simply try half a can of seafoam to tank and see if it helps. Old gas can deliver the same effect, were you still riding on fuel that came with bike.

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Re: Stalling Problem 88 GW 1500/6

Postby bustedwing » Fri Jul 27, 2012 6:15 pm

That would have been my thought, if the bike had sat any time before you bought it the fuel becomes old quick. Sea Foam in the gas cleans out any old gunk but if that doesn't cure the problem then change the fuel filter and check the fuel pressure.
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Re: Stalling Problem 88 GW 1500/6

Postby mgatortpd » Fri Jul 27, 2012 7:37 pm

As a matter of fact, yes I was driving on gas that was in it when I bought it, I did install a new fuel filter and air cleaner as well, both old ones seemed to be fairly new, old fuel filter was yellowish in color. Put new gas in it and now i will go locate seafoam(?) I will let you know tomorrow as it is storming here now, can't ride right now. On a side note, the use of this forum / site was very helpful, downloaded the manual and some info from the forum with pics (BIG HELP WITH PICS), thanks again!

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Re: Stalling Problem 88 GW 1500/6

Postby zamboni920 » Fri Jul 27, 2012 8:39 pm

Next time it happens, try to give it choke. The choke on these bikes gives more fuel to carbs, rather than the "old way" of choking air supply.

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virgilmobile
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Re: Stalling Problem 88 GW 1500/6

Postby virgilmobile » Fri Jul 27, 2012 11:18 pm

Choking the 1500 carb is a attempt to add more fuel into the system.If the engine picks back up,the fuel level is OK in the carbs..If it runs worse the fuel level is also OK.
If it doesn't help any,the fuel level is low...gas starved.

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Re: Stalling Problem 88 GW 1500/6

Postby mgatortpd » Sat Jul 28, 2012 5:06 pm

Still got a fuel problem....
starts but will not stay running when I give it throttle, replaced the fuel filter, replaced the ar filter, checked the tubes did not see any deteration or cracked air lines or fuel lines, I put 5 oz of Seafoam in tank....I even pulled the fuel filter off to make sure it has fuel in the line and it does. So I am guessing now it maybe the fuel pump? Very frustrating with buying a used bike that I thought was a good one, to bad the seller didnt have the balls to tell me! Any suggestions besides tearing him a new A#*@!$e?
My next option will be to take it to the Honda dealer in Tucson.

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Re: Stalling Problem 88 GW 1500/6

Postby mgatortpd » Sat Jul 28, 2012 6:06 pm

Ok, I called the Tucson Honda dealer and spoke to a service rep, he thinks the carbs need to be cleaned. So I thought maybe some carb cleaner can do the trick, so I did. IT FRICKEN WORKED! It runs, it idels and it accelerates! Hope this is the trick, will let you know!

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Re: Stalling Problem 88 GW 1500/6

Postby robb » Sat Jul 28, 2012 9:33 pm

Now that it is running good don't waste any time running through that tank of fuel. Sea Foam will clean as it passes but can cause some skipping as it cleans. Next tank will tell the truth, hopefully much better

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Re: Stalling Problem 88 GW 1500/6

Postby bustedwing » Sat Jul 28, 2012 10:06 pm

Right, Sea Foam will clean out gunk but it has totakethe gunk with it when it burns in the engine, so the engine may not run any better while Sea Foam is doing it's work, but the tank of fuel AFTER that it should be running better.
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Re: Stalling Problem 88 GW 1500/6

Postby mgatortpd » Sun Jul 29, 2012 9:59 am

Ok, I think I have narrowed it down to a fuel pump failure. I have checked all of the tubes, they are good, I have replaced the fuel filter and air filter. I have poured in 5 oz of Seafoam into a new tank of gas, I used some carb cleaner and it ran for a short while, fooling me to think I may have fixed the problem. NOW, it is back to not starting....but what I see is there is no gas going into the carbs (as I look down into the carbs with a flashlite) when it is being cranked, so I first pulled the fuel filter off and stuck a air line down into the fuel line coming out of the tank and add a small burst of air, looked into the tank and saw that the air was blowing through the fuel line down to the pump. Reconnected the fuel filter and tried to start again, still no start. So I took off the fuel filter again, holding a paper towel over the end of the fuel line and tried cranking over the engine, NO FUEL is coming out of the line from the tank! So this is why I think the fuel pump is bad. Would this be a correct assumption? I am not a mechanic by no means.

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Re: Stalling Problem 88 GW 1500/6

Postby virgilmobile » Sun Jul 29, 2012 10:19 am

I'm free today PM me and I can phone you to go over what to do.

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Re: Stalling Problem 88 GW 1500/6

Postby mgatortpd » Sun Jul 29, 2012 11:55 pm

Well Virgil, after listing to your advice, and I THANK YOU VERY MUCH!, I followed your advice, removed the fuel pump from the tank.

At first, I hooked some 12 volt juice to it, and after a tap on the housing I could hear the fuel pump propeller trying to work, at one point it did. So I submerged the pump housing into a large plastic coffe can of seafoam, hooked it back up with 12 volt juice and I started to pump, but intermitently and in spurts. So I tapped on it a few more times and it sounded like something was logged in the actual fuel pump propeller. So I disassembled the pump housing, turned the pump motor upside down and tapped it on a hard surface, dislogging debrie. I then hooked it back up to 12 volt power and it worked like a champ. I then let the pump run in the can of Seafoam for about an hour and it pumped like a champ, kind of amazed at the flow pressure it was putting.

Second, I siphoned the entire tank of gas out, and found more debrie in the bottom of the tank, including some small black rubberstub pieces, metal shavings and gunk. Cleaned the tank with a paper towel to dry it out, used a vac to suck out any debire, used my air hose to air out the tank and loosen any other debrie , vac it again. Then sprayed some carb cleaner inside the tank, air dried it and it looks like new, didnt see any rust. I cleaned the electric terminals on top of the outter pump lid with some cleaner. Put it all back together tonight, will go get a can of clean gas in the morning and fill the tank, keeping my figers crossed, it will start and run like a champ. I will let you know what happens.

It is 9:35 PM in Tucson and I am beat, thanks again for the advice!
Before
Before
After
After

pump motor
pump motor
Pump after debrie was dislogged
Pump after debrie was dislogged

Cleaner applied to connections
Cleaner applied to connections
After cleaner was applied
After cleaner was applied

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virgilmobile
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Re: Stalling Problem 88 GW 1500/6

Postby virgilmobile » Mon Jul 30, 2012 10:37 am

Your doing great for a "not a mechanic" fellow.
Good job.It looks like you got this one licked. :D

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Re: Stalling Problem 88 GW 1500/6

Postby bustedwing » Tue Jul 31, 2012 2:23 pm

Sounds like you saved yourself a good chunk of change by cleaning out that pump and tank. Hopefully there won't be any gunk in the carbs also. But cross that bridge when you get to it. Having a good technition to advise you is always nice. Congrats, even for not being a mechanic, you did good.
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Re: Stalling Problem 88 GW 1500/6

Postby zamboni920 » Tue Jul 31, 2012 4:27 pm

I think Virgil might have a Star for you for job well done :lol: .

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virgilmobile
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Re: Stalling Problem 88 GW 1500/6

Postby virgilmobile » Tue Jul 31, 2012 5:27 pm

Sure do...Here it is.
Well,ya have to print it on some sticky paper tho.

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Re: Stalling Problem 88 GW 1500/6

Postby bustedwing » Tue Jul 31, 2012 8:18 pm

That's pretty god virgil, I didn't really think you'd have a gold star for him.
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virgilmobile
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Re: Stalling Problem 88 GW 1500/6

Postby virgilmobile » Tue Jul 31, 2012 8:39 pm

I'll give credit to anybody that is willing to get that personal with their bike and breath life back into it rather than waisting their money on a parts changer mechanic.
This is what I call " fixing" the problem.
Remember,there was a time that I didn't know squat about bikes either.
That's why I like this site.The ability to share information.

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Re: Stalling Problem 88 GW 1500/6

Postby mgatortpd » Tue Jul 31, 2012 9:44 pm

Well, I filled the tank with NEW high octaine gas this morning and fired her up, and she purrs like a kitten!

I owe it to this website, forum and Virgil for motovating me to "DO IT MYSELF". I truely was very apprehensive at first, but once I scanned through this website and saw the information explained in terms that I could understand and the pics that helped me understand the step by step process, I felt more at ease and thought I can do this. Plus the phone call from Virgil really helped me to conect the dots. So I owe it to you guys for having such a awesome website and forum.

My father-n-law lives in Illinois and he ownes a cherry 1984 GW 1200. He asked how I was able to fix the bike and told him about your website, but of course he does not own a computer, heck he barley knows how to use a cell phone. Tomorrow I start my 3 day motorcyle safety class to get my M/C License in AZ. My next project will be changing the timing belts as Virgil suggested, saw the "HOW TO" on changing the belts, and it looks like a challenge, but I am up for it.

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Re: Stalling Problem 88 GW 1500/6

Postby bustedwing » Wed Aug 01, 2012 12:11 pm

That is great, congrats on getting your machine running again and for having the confidence to tackle the timing belts. You can do it as long as you follow the steps perfectly, and you will have another trophy to hang on your garage wall.It sounds like we have a new mechanic on our hands!!
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Re: Stalling Problem 88 GW 1500/6

Postby Kiwi2 » Mon Aug 06, 2012 5:02 am

Very impressive. Now what is sea foam? the only sea foam I know is the stuff of the waves at the beach.

I don't recall seeing it here in NZ.

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Re: Stalling Problem 88 GW 1500/6

Postby bustedwing » Mon Aug 06, 2012 9:05 am

Sea Foam is a fuel and oil additive that is great for cleaning out gunk from dirty carbs or noisy lifters. It will save, a lot of times, a rebuid job to a carb and it will clean out old clutch fibers lying around inside your crankcase and improve oil pressure.It is available at most automotive parts stores and big box stores.Never been to NZ so not sure of the status of stores there.


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