88 GL quits running


Information and questions on GL1500 Goldwings (1988-2000)
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Jim Wolf
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Joined: Sun Aug 18, 2013 3:11 pm
Location: Chandler, Texas
Motorcycle: 1988 GL1500 1996 GL1500 SE Trike

88 GL quits running

Postby Jim Wolf » Thu Aug 29, 2013 12:57 pm



I have a 1988 GL1500 w/about 90K on the meter. The bike has been running great til about 3 wks. ago when it quit while riding. Would not restart. Came home on a truck. I have tested everything I could think of. I have installed a new ECU, Fuel cut relay, fuel filter, carb control unit. Tested relays, stop switch. I have bench tested the fuel pump and it runs but does not seem to pump. I replaced the fuel filter but it is not filling up when cranking. I did a voltage test at the pump and discovered that the voltage to the battery side of the pump loses voltage when cranking. Sometimes the bike trys to start but there is no fuel getting to the filter. I am stumped. I need help. The bike just about reaches operating temp. for the fans to kick on but then dies. Can't restart most of the time til the bike cools for a while. Additionally I put a new battery in about 3 days ago.



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virgilmobile
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Re: 88 GL quits running

Postby virgilmobile » Thu Aug 29, 2013 3:29 pm

I have a 88.the pump should only have volts when there's spark.
That said,if the battery has low volts (less than 10 volts) during cranking,the ECM will not spark(seen that on mine) and there will be no fuel.
2nd problem.The fuel shutoff valve is vacuum operated.If you open the throttle while cranking,the valve has a hard time opening.
3rd if there is a vacuum leak in the hose(cracked hose) or a pinhole in the diaphragm,it will also have a hard time trying to keep the valve open.Check the hose and vacuum part of the valve.
4th if all the vacuum and volt stuff checks out OK,it simply can be a near dead pump.
Some have had success by disassembly and cleaning the debrea from the impellers.
You can test the pump in the bike by removing the fuel line and applying 12 volts direct to the pump power terminal.It should pump fuel directly into your container.

Jim Wolf
Posts: 7
Joined: Sun Aug 18, 2013 3:11 pm
Location: Chandler, Texas
Motorcycle: 1988 GL1500 1996 GL1500 SE Trike

Re: 88 GL quits running

Postby Jim Wolf » Thu Aug 29, 2013 3:48 pm

Thanks for the reply. Like I said the battery is brand new and kept on a tender. As for the fuel valve, the hose has vacum as checked with the engine running. I applied a mity vac to the valve and found the vacum to hold while the bike is running. I'm guessing at this point it should not have done that.

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virgilmobile
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Re: 88 GL quits running

Postby virgilmobile » Thu Aug 29, 2013 4:03 pm

I'm guessing at this point it should not have done that.


No harm done...Actually that was a proper test...vacuum OK,valve holds a vacuum....Valve functioning properly....Good job...one part confirmed good...now onto the pump...
About your pump bench test......Here's some 'by the book' details...If the pump is bad,I've heard others replacing them with a generic pump from Autozone...I think it's from a Honda prelude....
If you think the pump is bad,you could (for testing only) rig up a gas can with a couple gallons suspended 4 foot above the bike and gravity feed the filter...It will give it almost 2 psi of fuel.Enough to easily keep the bike running in the shop....
Do remember,the pump needs 12 volts to run in the bike...You can jump the relay as described or simply connect it's terminal direct to the battery....taking all the necessary precautions...
Unhook the power to the bikes fuel pump...

Jim Wolf
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Joined: Sun Aug 18, 2013 3:11 pm
Location: Chandler, Texas
Motorcycle: 1988 GL1500 1996 GL1500 SE Trike

Re: 88 GL quits running

Postby Jim Wolf » Thu Aug 29, 2013 5:49 pm

I have hooked direct voltage to the pump in the bike. I can hear the pump running but it does not seem to be pumping anything. I have also done the jumper test to the relay with the fuel line unhooked from the filter into a beaker. That is why I changed the filter thinking the filter was restricting it. Still the same.

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virgilmobile
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Re: 88 GL quits running

Postby virgilmobile » Thu Aug 29, 2013 9:35 pm

Starting to sound like its time to either force feed it fuel or pull the pump apart with the idea of possibly needing to replace it.
I'd force feed it first to verify everything else is fine,then rip the pump out.
No harm in tearing it apart when you know it has to be changed

Jim Wolf
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Motorcycle: 1988 GL1500 1996 GL1500 SE Trike

Re: 88 GL quits running

Postby Jim Wolf » Fri Aug 30, 2013 8:44 am

Thanks for the help sir. That is sort of where I was headed but was hoping to avoid it. I will tear the pump down and check it. I already soaked about $700 in parts. It's getting pricey. I'll try to let you know what I find. Thanks again. Real quick though, is it possible for the pump motor to run but the impeller is stuck? Hmmmmmm?

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virgilmobile
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Re: 88 GL quits running

Postby virgilmobile » Fri Aug 30, 2013 8:59 am

I won't say no.as I vaguely remember,the impeller just sets on a keyed shaft.the impeller has vanes or blades that float in the housing.They could just be stuck.

More info from the web...
"In reviewing our product line-up any pump that would come close to meeting the dimensional and flow specifications of the former FE0009 all have been obsoleted. I had reviewed earlier catalog data prior to the obsolescence and have indications that the Delphi FE0009 would have been used as an in-take feed pump for either a 1985 or 1986 Chevrolet Celebrity equipped with a 2.8L VIN “X” engine. This morsel of information may provide you with enough ammunition to find a compatible facsimile. Thank you for your inquiry and consideration."

And more...
"the Napa P72190 fuel pump ($60) runs at 15 GPH which is closer to the stock 10 GPH. The Delphi and Airtex pumps listed in other posts are running at +/- 20 GPH."

Jim Wolf
Posts: 7
Joined: Sun Aug 18, 2013 3:11 pm
Location: Chandler, Texas
Motorcycle: 1988 GL1500 1996 GL1500 SE Trike

Re: 88 GL quits running

Postby Jim Wolf » Fri Aug 30, 2013 10:11 am

A quick update. I removed the pump and removed the motor. Did not find debris or anything. Reassembled unit and reinstalled same. I started the bike and it instantly filled the filter and ran through 3 cycles of the cooling fans. The most it has done since it quit. I finally turned it off. Quite possible just knocking it around loosened it up. We'll see. Thanks for the help. Much appreciated.

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virgilmobile
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Motorcycle: 1988 GL1500 I
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78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: 88 GL quits running

Postby virgilmobile » Fri Aug 30, 2013 10:22 am

Possibly just some gunk stuck in the wrong spot...You might concider running some Sea Foam in the fuel to clean it up a bit...Keep us posted.

Jim Wolf
Posts: 7
Joined: Sun Aug 18, 2013 3:11 pm
Location: Chandler, Texas
Motorcycle: 1988 GL1500 1996 GL1500 SE Trike

Re: 88 GL quits running

Postby Jim Wolf » Fri Aug 30, 2013 10:43 am

I just tried to run the bike again. It started then died. Fuel filter is full. I used a test spark plug and don't see any spark grounding it to the head. Seems to happen when it is warmed up, although it did run through 3 cycles of the fans before I shut it off the first time.

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virgilmobile
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Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: 88 GL quits running

Postby virgilmobile » Fri Aug 30, 2013 11:28 am

Check your battery volts.Mine will not start with a weak battery.The ECM will not spark when the volts drop below 9.8 volts while cranking.Any yes it still cranked over.
Look at the battery volts again if you can get it started.It should be above 12.8 at least.
If the battery volts are OK.get to the kill switch wires in the right handlebar cover.
The 12 volt feed wire to the ignition is a black with a white tracer.See if it has at least 10.8 volts while cranking.

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Wingsconsin
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Re: 88 GL quits running

Postby Wingsconsin » Fri Aug 30, 2013 2:16 pm

Jim Wolf wrote:I just tried to run the bike again. It started then died. Fuel filter is full. I used a test spark plug and don't see any spark grounding it to the head. Seems to happen when it is warmed up, although it did run through 3 cycles of the fans before I shut it off the first time.


I seem to remember something about the main fuse (30 amp dogbone) will work when cold and then not when hot due to an age related cracking..??? :?
Might be something to check out too....
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ronscycle1.
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Location: kinmundy ,IL.
Motorcycle: 1987 gl 1200 i

Re: 88 GL quits running

Postby ronscycle1. » Sat Aug 31, 2013 2:56 am

Wingsconsin wrote:
Jim Wolf wrote:I just tried to run the bike again. It started then died. Fuel filter is full. I used a test spark plug and don't see any spark grounding it to the head. Seems to happen when it is warmed up, although it did run through 3 cycles of the fans before I shut it off the first time.


I seem to remember something about the main fuse (30 amp dogbone) will work when cold and then not when hot due to an age related cracking..??? :?
Might be something to check out too....


my 87 1200 i would die for no reason when warm ,it was the pick up coil

raycw
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Motorcycle: 88 GL1500

Re: 88 GL quits running

Postby raycw » Sat Aug 31, 2013 10:58 am

My 88 had the fuel pump go out and it was similar to your experience. But…. there are other things it might be.

Try: removing the fuel cap… or just loosen it and start the engine.

The Pulse Generator is famous for working when the bike is cool and failing as it heats up. Generally the bike would have to cool down overnight before the PG would start again. Other times it just fails… period! There's an AC voltage test that is a positive diagnostic proceedure. PM me.. I can give you the proceedure.




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