85 gl1200 Ltd not starting


Information and questions on GL1200 Goldwings (1984-1987)
  • Sponsored Links
Post Reply
Eric.m.
Posts: 2
Joined: Sun Jul 22, 2018 10:02 pm
Location: Ft Walton florida
Motorcycle: 1985 gl1200 Ltd

85 gl1200 Ltd not starting

Post by Eric.m. » Wed Aug 01, 2018 11:34 pm



I recently picked up a 1985 gl1200 ltd for next to nothing. Problem is it doesn’t run. Cleaned the tank, replaced the fuel pump and filter, cleaned fuel rails and injectors, replaced the crank position sensor or “pulse generator” and still nothing. I replaced the PG because the plugs would spark when cold but as soon as the motor cranked over more than 5 times it would stop sparking... this is still occurring after the PG has been replaced. It’s flashing codes 02, 012 and 3 alone. Any thoughts or suggestions would be greatly appreciated. One more question does anyone have a supplementle manual they could email me?



User avatar
virgilmobile
Posts: 8720
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: 85 gl1200 Ltd not starting

Post by virgilmobile » Thu Aug 02, 2018 11:53 am

I'll give it a go but first...I don't recognize the code numbers ..2-12-3
Does you bike have lights on the module that show like this?



User avatar
Rednaxs60
Posts: 1883
Joined: Wed Nov 18, 2015 12:44 pm
Location: Victoria, British Columbia, Canada
Motorcycle: 1985 GL1200 LTD
1995 GL1500 SE CDN Edition
2008 GL1800 (sold)
Ontario 1985 GL1200 LTD (sold)

Re: 85 gl1200 Ltd not starting

Post by Rednaxs60 » Thu Aug 02, 2018 12:32 pm

I'll chime in as well. Is the Fuel System light on on the dash. This light is similar to the check engine light on a car.

The "W" light is on whenever there is an error code . For the "W-0-2" air temp sensor fitted into the top of the air cleaner, the engine will start and operate, but the fuel system light will be on as well. Check this - disconnect and connect - error code should go away.

The other codes you are seeing on the ECU are for the injectors for all cylinders. I would disconnect and reconnect the injector connections to see if the error codes disappear.

When you turn on the key do you hear the fuel pp come on for about 2-4 seconds then stop? If so the fuel circuit is operating correctly. The fuel pp will start immediately when the engine starts.

Why did the PO sell the bike to you for such a low price as you mention? Any info you can provide us would help.

PM sent.

Cheers
"When you write the story of your life, don't let anyone else hold the pen"

Ernest

User avatar
ct1500
Posts: 1076
Joined: Wed Nov 10, 2010 8:09 pm
Location: Glastonbury,CT
Motorcycle: 1988 GL1500
Contact:

Re: 85 gl1200 Ltd not starting

Post by ct1500 » Thu Aug 02, 2018 4:07 pm

So you do have some spark when cranking and if fuel was present it should start. You can try a slight shot of starting fluid in the intake to see if it wants to start.
I suspect a no fuel condition getting to the injectors, find the fuel pressure service port and depress the valve, if pump and regulator are operational there should be about 30psi after fuel rail is pressurized.
Local and need repair help with your 1500, Valkyrie or ST please click contact
Nothing leaves my shop till its' perfect
This is what I do

Eric.m.
Posts: 2
Joined: Sun Jul 22, 2018 10:02 pm
Location: Ft Walton florida
Motorcycle: 1985 gl1200 Ltd

Re: 85 gl1200 Ltd not starting

Post by Eric.m. » Thu Aug 02, 2018 10:30 pm

Fuel pump runs 2-3 seconds when you turn the key, it has the appropriate amount of fuel pressure. So the codes it is throwing are mainly for the injectors? I was worried about that.. I was able to open the injectors and clean them by pulling them off of the bike, actuating them by running 12 volts and spraying them with throttle body cleaner and a final spray with compressed air. When I ran power to them I herd them hem click open. Before I did this I wanted to see which side was positive and negative, doesn’t really matter but I was curious so when I had the injectors out of the bike I turned the key on and tried to find the negative side of the plug by checking continuity from negative battery terminal to either side of the plug. I only did this because I didn’t have a manual to tell me which was which. Anyway. I was never able to complete a circuit on either side of the plug. So I probably have a short or something is unplugged. Back to the spark issue.. I don’t understand why it would crank and spark for literally 5 seconds and stop.. the guy I bought it of was an old timer and didn’t want to work on it. It was his brothers bike originally and it would run and than die randomly. When I herd this I thought okay must be the pulse generator. But after replacing I still have the same problem. I’m pretty stuck but I’m sure with a little more digging I will figure it out.

User avatar
ct1500
Posts: 1076
Joined: Wed Nov 10, 2010 8:09 pm
Location: Glastonbury,CT
Motorcycle: 1988 GL1500
Contact:

Re: 85 gl1200 Ltd not starting

Post by ct1500 » Fri Aug 03, 2018 7:28 am

Eric.m. wrote:
Thu Aug 02, 2018 10:30 pm
Before I did this I wanted to see which side was positive and negative, doesn’t really matter but I was curious so when I had the injectors out of the bike I turned the key on and tried to find the negative side of the plug by checking continuity from negative battery terminal to either side of the plug. I only did this because I didn’t have a manual to tell me which was which. Anyway. I was never able to complete a circuit on either side of the plug. So I probably have a short or something is unplugged. Back to the spark issue.. I don’t understand why it would crank and spark for literally 5 seconds and stop..
Randomly probing electronic ECM connections are the one thing you are not supposed to do. You will likely not find a ground because the ECM does that as well as supplying voltage with engine cranking or running, checking for continuity is alright with key off. Noid lites are used to plug into a harness to observe electrical function.

With regard to the spark dropping out it would be OK to test battery positive of coil to see if it is cutting out there.


Local and need repair help with your 1500, Valkyrie or ST please click contact
Nothing leaves my shop till its' perfect
This is what I do

Post Reply