Idle Surge


Information and questions on GL1500 Goldwings (1988-2000)
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Basschaser
Posts: 41
Joined: Sat Mar 15, 2014 2:39 am
Location: Valrico Florida
Motorcycle: 1995 GL 1500 SE Goldwing

Idle Surge

Postby Basschaser » Wed Sep 10, 2014 2:16 am



Hey Guys. First I have a 95 GL1500SE 35K miles. When I first start it up it idles fine I have it around 800 stays pretty steady. The last few times I rode it I noticed when I stop at a red light and it starts getting hotter. When the temp gauge gets to about half way that's about when the fans come on. The idle will go up to about 1100 then back down then up again. Is this normal because the temp is rising or should I be concerned that's something is wrong. Other then that the bike runs fine. When I start moving again the temp will lower and go back to were it normally stays. It only surges at idle not when I'm riding at a steady speed. and Mr. Wingadmin I was reading about that guy was in a really bad crash lots of broken bones I had to get off the site Boss came in and I couldn't find it later I hope he is doing OK and has a fast recovery. I didn't get a chance to read what happened to cause the accident. Can U tell me were that was on the site and have U had any updates on how he is doing? Thanks for any Help.



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raven41951
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Location: Haverhill, MA
Motorcycle: 2016 GL1800
1994 GL1500SE (sold)
1995 VT1100 C2 Shadow ACE (Gifted)
1975 Kawasaki 500

Re: Idle Surge

Postby raven41951 » Wed Sep 10, 2014 6:51 am

I also had some surging with my '94 SE. I added an ounce of Starbrite Startron to each tank and it performed as advertised. After the first tank my idle speed went up 200-250 rpm and the low end torque was greatly improved. No instrumentation proof, just years of twisting my right wrist. I now add an ounce to every three tanks and engine performance is great. It really does solve all those ethanol related issues.

As far as the engine cooling issue, I would check to make sure the system components are functioning properly, flush the cooling system and replace the antifreeze, making sure to use AF that is safe for aluminum engines. My SE has no cooling issues but my 95 110 Shadow ACE had a similar issue. I replace the sensor, thermostat and flushed the system but there was always an issue where the hot light would come on but the fan would not, then the fan would finally come on. I fixed it by giving the bike to my brother!

Basschaser
Posts: 41
Joined: Sat Mar 15, 2014 2:39 am
Location: Valrico Florida
Motorcycle: 1995 GL 1500 SE Goldwing

Re: Idle Surge

Postby Basschaser » Wed Sep 10, 2014 7:45 am

Thanks for the Info Mr.Raven We have had a lot of WaWa gas stations popping up around here in Florida that sell Ethanol Free gas so I have been using that but only 2 tanks so far its only 89 Octane. That Starbrite u said is that the same as sea foam? I have already flushed the cooling system out I had a leak. so I did it after I fixed the leak. I half to changed all the fluids don't know what the guy did that had it before me. Or when he did it I should say. Thanks for Your help. And that was funny so U gave the Problem to your Brother.

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raven41951
Posts: 128
Joined: Tue Jun 10, 2014 8:36 am
Location: Haverhill, MA
Motorcycle: 2016 GL1800
1994 GL1500SE (sold)
1995 VT1100 C2 Shadow ACE (Gifted)
1975 Kawasaki 500

Re: Idle Surge

Postby raven41951 » Wed Sep 10, 2014 8:11 am

Startron is not the same as SeaFoam, but they do pretty much the same thing, only in different ways. My preference is for the Startron due to my great success with it. I should have added more history. Both my Goldwing and ACE had been idle for a while. The ACE had been sitting for three years and I drained and flushed the fuel system. The 'Wing had only 2330 miles on it and I am the third owner ( May to now 7,000+). The person I bought it from bought it from an estate so it had also been sitting for a while, the second owner screwed up his left ankle and now rides a three wheeler. I used the startron in the wing first, then the ACE; the wing results were good, but after running one tank in the ACE, it was like I rebuilt the carbs, no more low idle stalling, plenty of torque. If your bike has ever had ethanol gas in it, the it needs to be flushed. Startron/Starbrite is a Florida company so you might want to try it.

As far as the cooling issue, I should have started with checking the coolant level which could indicate a leak or cause overheating (my brain was going faster than my fingers could type). Having fixed that and if all the components are functioning properly, you should be OK.

Always look on the bright side of life!

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HawkeyeGL1200
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Motorcycle: 1984 GL1200 Interstate
1981 GL1100 Interstate

Re: Idle Surge

Postby HawkeyeGL1200 » Wed Sep 10, 2014 9:14 am

I would check for cracked or broken vacuum line(s).
I am wrong as often as I am right concerning what is wrong with someone else' motorcycle without having seen the machine in person. Guessing with limited information, as to the source of the trouble, is sketchy at best.

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bstig60
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Motorcycle: 1999 GL1500AC ASP
1999 Virago XV1100LC
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Re: Idle Surge

Postby bstig60 » Wed Sep 10, 2014 3:26 pm

A partially clogged pilot circuit, a vacuum leak or a pinhole in a diaphragm will cause the surging. As far as heating up on a hot day in slow traffic or at a light, both my 1500's do that. When you start moving again, the temp goes back down to normal.
Bill

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ct1500
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Re: Idle Surge

Postby ct1500 » Wed Sep 10, 2014 8:59 pm

The temp gauge and the fan action sound normal and should have no bearing in causing a surge.

What I think is happening is when the fans come on it is drawing the electrical system down a bit making the alternator use a little more engine HP and thus dropping the idle down to an RPM where your carbs either through plugged passages or vacuum leaks begins the surge.

With the engine at idle on the center stand play around with the Idle speed screw by the fuel cap and I will almost guarantee you can recreate a surging with idle speeds set somewhere between 700 and 1100 RPM without the fans coming on. The engine should never surge regardless of RPM setting.
This is what I do
Local and need repair help with your 1500, Valkyrie or ST please PM

Basschaser
Posts: 41
Joined: Sat Mar 15, 2014 2:39 am
Location: Valrico Florida
Motorcycle: 1995 GL 1500 SE Goldwing

Re: Idle Surge

Postby Basschaser » Thu Sep 11, 2014 1:29 am

First I would like to thank all u guys for your help. Yes I was thinking a vacuum leak myself. I have already found one and fixed it. I will keep looking. Getting hot when I stop I figured that was normal no air moving over the motor and your right as soon as I start moving it goes back to normal. I get off at 2PM Right at the hottest part of the day. I plan on working on it this weekend I have only one thing left to repair the CB. So I can look for Vacuum leaks after I remove everything to get to that. Thanks again for the info.

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bstig60
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1999 Virago XV1100LC
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Re: Idle Surge

Postby bstig60 » Thu Sep 11, 2014 1:42 am

Look for a hardened vacuum line and/or where the lines have 90* bends, they are prone to cracking in areas close to the manifolds and where they get high heat. Here's a link to a thread that might be of help: viewtopic.php?f=6&t=19261
Bill

Basschaser
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Joined: Sat Mar 15, 2014 2:39 am
Location: Valrico Florida
Motorcycle: 1995 GL 1500 SE Goldwing

Re: Idle Surge

Postby Basschaser » Tue Oct 21, 2014 4:38 am

Thank u CT500 and everybody sorry took so long to get back I looked for a vacuum leaks didn't find any so I tried the Idle Adjust knob. I idle it down then back up to about 600 to 700 and it worked no more surge. the other Moring I started it and it kind of cough or a small back fire. So this week end I changed all the spark plugs. This morning it didn't back fire any so I think I got that. how ever I tried to take my CB apart and look for any loose wires. WOW. lots of wires didn't find any do U guys know of any body that repairs them ? Thanks.

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WingAdmin
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Re: Idle Surge

Postby WingAdmin » Wed Oct 22, 2014 10:29 am

Basschaser wrote:Thank u CT500 and everybody sorry took so long to get back I looked for a vacuum leaks didn't find any so I tried the Idle Adjust knob. I idle it down then back up to about 600 to 700 and it worked no more surge. the other Moring I started it and it kind of cough or a small back fire. So this week end I changed all the spark plugs. This morning it didn't back fire any so I think I got that. how ever I tried to take my CB apart and look for any loose wires. WOW. lots of wires didn't find any do U guys know of any body that repairs them ? Thanks.


Sierra Electronics repairs them, usually for a flat rate, around $100.

Basschaser
Posts: 41
Joined: Sat Mar 15, 2014 2:39 am
Location: Valrico Florida
Motorcycle: 1995 GL 1500 SE Goldwing

Re: Idle Surge

Postby Basschaser » Thu Oct 23, 2014 3:47 am

Thanks very much Wing Admin.




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