Hard starting gl1500 problem confirmed


Information and questions on GL1500 Goldwings (1988-2000)
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virgilmobile
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Hard starting gl1500 problem confirmed

Postby virgilmobile » Thu May 09, 2013 12:35 pm



Mainly with the 1500,but can affect others too.
Scenario.....Parked bike for 3 weeks.....Go to start it...It cranks but won't fire off.

Tried all the suggestions...cycle the pump,twist the throttle,a little choke,etc etc.....
Finally it gets going.....

Now to the present day...I purchased a Digital volt meter for the bike and installed it.

It is wired to a accessory switching relay direct from the battery so I'm confident and confirmed that the display is dead accurate in what it shows is actually the voltage available.

The wing sets for the 3 weeks again(no battery tender)..all by it's lonesome self,in the dark no less
Same problem...it will not fire right up....
This time I watch 2 things...I notice that when I crank the engine,the tach moves very little and sporadically.
The second thing I see is,even tho the bike is cranking a normal speed..the voltage indicated on the DVM is right at 9.4 volts....

Ah ha I said to myself.....I quit cranking and attached my charger to the battery for just 15 minutes at 6 amp rate.

Pulled the charger and pushed the start button.The volts dropped to 10.7 and the bike fired instantly.....

Moral of this long winded tail is the ignition will not fire properly if the volts supplied to it drop in the 9 volt range....Even if the bike still cranks over,it will not fire.....

Now to figure out a solution.......I wouldn't want to be stranded with a weak battery in Cajun country.



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WingAdmin
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Re: Hard starting gl1500 problem confirmed

Postby WingAdmin » Thu May 09, 2013 8:55 pm

That's pretty normal - low voltage will prevent a start. Is yours a wet cell battery? If so, check the electrolyte. Otherwise, sounds like it's time to start shopping for a new battery.

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cbx4evr
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Re: Hard starting gl1500 problem confirmed

Postby cbx4evr » Thu May 09, 2013 9:00 pm

I was going to ask the same question - is it a wet cell battery? If so that's probably why it's going dead on you.

Try an AGM battery. Lasts a lot longer.
"It´s a friggen motorcycle, it´s not supposed to be comfortable, quiet or safe. The wind noise is supposed to hurt your ears, the seat should be hard and riding it should make you s**t your pants every now and then. "

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ct1500
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Re: Hard starting gl1500 problem confirmed

Postby ct1500 » Thu May 09, 2013 9:38 pm

MC specific cables are an essential. Have never had to use them for my ride. They have seen action for my riding buddies H-D's though. Good old GW. :D

http://cyclemax.com/inc/sdetail/430
This is what I do
Local and need repair help with your 1500, Valkyrie or ST please PM

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virgilmobile
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Re: Hard starting gl1500 problem confirmed

Postby virgilmobile » Fri May 10, 2013 7:13 am

My 88 is stock,the battery is 6 months old high quality wet cell.
Same stuff most of the world uses.
It ONLY has the hard starting problem after a long (3 week) rest in the dark.
I know a parasitic radio draw will droop a battery some.
This is what happens on it.
Drive it once a week and never a problem,use a charger during the long rest and its OK too.
so I know i have no battery or charging issues.

The point of the test was to confirm that if the battery is a bit low,the bike can crank fine but not fire and one should not panic thinking there is a major problem.
Just keep the battery volts up.

Yes I will use the charger during the long rest and never speak of this again.
Or figure out some kind of magic so this will never happen again...just in case i forget to plug it up.

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ct1500
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Re: Hard starting gl1500 problem confirmed

Postby ct1500 » Fri May 10, 2013 8:04 am

virgilmobile wrote:Yes I will use the charger during the long rest and never speak of this again.
Or figure out some kind of magic so this will never happen again...just in case i forget to plug it up.


Virgil,

Only other magic to help start would be a fresh set of spark plugs gapped at .032

Worked on my ride with the wet cell, have since gone to AGM as it needed replacement.
This is what I do
Local and need repair help with your 1500, Valkyrie or ST please PM

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virgilmobile
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Re: Hard starting gl1500 problem confirmed

Postby virgilmobile » Fri May 10, 2013 9:45 am

Complete service done....no issues IF I don't just let it set for a month.
I just forgot to plug it up once...just annoying,that's all.

It becomes a issue if I should have to go offshore for a unexpected time.I come back to a hard starting bike..I needed to confirm why so I can avoid it in the future.

I've even drawn up a schematic using a battery backup for reserve power to the ignition only.
Hmmm...a cheap 12v9ah battery would work fine.....relay controlled to separate it from the bike while setting for a month...but being charged while running .....

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virgilmobile
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Re: Hard starting gl1500 problem confirmed

Postby virgilmobile » Sat May 11, 2013 11:58 am

Design flaw noted in the above schematic.Backfeed from the backup battery keeps the relay energized.
Another relay is needed before the NC operated by the ign and a separate feed from the main batt
I'll post a revised schematic as soon as I can.
Otherwise I does work to utilize a separate battery for the ignition while cranking.
A bypass switch should be added to disable the circuit too.

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Kiwi2
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Re: Hard starting gl1500 problem confirmed

Postby Kiwi2 » Sat May 11, 2013 9:29 pm

If the bike is left for too long before starting I have this method. Ignition on, choke on, hit start button and let the engine crank over a few times, then turn everything off. Leave the bike for a few minutes and do the same thing again. On the third try it should start up as you have now re-primed the carbs and forced some petrol (gas) through the required pipes etc.

Else a new battery may be required. 1500 are stinkers for wanting a new battery. Everything will fire up and start and away you go for your ride and when you stop for a cuppa and want to go again and you hit the start button there ain't a sound, a murmer, nuthing apart from the rider giving the bike it's parentage. :oops: :oops:

Best of luck.

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virgilmobile
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Re: Hard starting gl1500 problem confirmed

Postby virgilmobile » Sat May 11, 2013 10:04 pm

Your method also worked for me early on.
I just had to find out why i needed to do that.
I did confirm that when the ignition module has voltage below 9.8 volts,it really won't fire very well.

I Did add a switching relay to the ignition system to provide direct battery power which helped when the battery was a bit weak as i did measure a bit of a voltave drop (0.58 volts)in the system.
I also jut today added a backup ignition battery to power the ignition seperatly from the main battery.It works very well.The cranking battery can fall to 9 volts but the ignition battery,being seperate,stays above 12 volts.
When the bike starts,the isolation relay connects back to charge the backup battery.
It's kinda like having a built in jumper box.
Now,reguardless of what the cranking volts are,I have plenty of ignition power.



This is all just for fun as i am really bored.
It is a confirmed alternative to a unlikley problem.
Just keeping the battery fully charged doea the same thing.

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redial
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Re: Hard starting gl1500 problem confirmed

Postby redial » Fri May 17, 2013 11:54 pm

Have you checked to see if you have a leakage while the GW is sitting? Sometimes you may find a connection that is bleeding a little each day, which is just enough to drain the battery over three weeks, but not enough over a week.
Len in Kapunda

The world is not going to finish today, as it is already tomorrow in Australia and New Zealand, and other islands of foreign nations such as Guam and Samoa.

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virgilmobile
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Re: Hard starting gl1500 problem confirmed

Postby virgilmobile » Sat May 18, 2013 7:34 am

Parasitic draw is normal.About 22 ma.
There really isnt a problem,just annoying that the bike wont fire if I leave it for many weeks and forget to put on the charger.
Same thing happens with my Explorer.Battery DOA after 6 months of setting.

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ct1500
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Re: Hard starting gl1500 problem confirmed

Postby ct1500 » Sat May 18, 2013 7:57 am

My bike draws 1 ma and service manual states no more than 5 ma.
This is what I do
Local and need repair help with your 1500, Valkyrie or ST please PM

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virgilmobile
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Re: Hard starting gl1500 problem confirmed

Postby virgilmobile » Sat May 18, 2013 11:36 am

Hmmmm.I'll double check the standby draw again

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redial
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Re: Hard starting gl1500 problem confirmed

Postby redial » Thu May 23, 2013 2:01 am

And the answer was ......
Len in Kapunda

The world is not going to finish today, as it is already tomorrow in Australia and New Zealand, and other islands of foreign nations such as Guam and Samoa.

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virgilmobile
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84 GL 1200 I

Re: Hard starting gl1500 problem confirmed

Postby virgilmobile » Thu May 23, 2013 7:23 am

Haven't been back yet.2 more days till I get to play with it.
The very first thing I'll do is insert a milliamp meter in line and check the drain.




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