87 gl 1200 i fuel pump


Information and questions on GL1200 Goldwings (1984-1987)
Post Reply
User avatar
ronscycle1
Posts: 60
Joined: Sat Oct 31, 2009 2:58 pm
Location: Kinmundy IL.
Motorcycle: 1987 gl 1200 I

87 gl 1200 i fuel pump

Post by ronscycle1 »



Hi thank you for your help : bike SAT for about two months waiting to put tires it ran fine when I parked it waiting for the tires,got the tires put them on ,new battery,new tags,went to start it no start, backfired really loud a couple times sprayed carb cleaner in air filter ,still no start ,so I checked plugs for fire the front was fireing but not the back,so I crossed wires on coils by jumping them now had fire on the rear plug .So from what I've read it's the IGN pickup coils under the timing belts.Do you think that's what it is too ?The reason I asked about the fuel pump was because when I drained the carbs cause I knew it would be awhile before I could fix it , the carbs on the left side had gas in them but the two on the right had none and I cranked it over about five minutes trying to get it started before that. could this be because of the IGN pickup coils not telling the ECU not to let the fuel pump work ?



User avatar
ronscycle1
Posts: 60
Joined: Sat Oct 31, 2009 2:58 pm
Location: Kinmundy IL.
Motorcycle: 1987 gl 1200 I

Re: 87 gl 1200 i fuel pump

Post by ronscycle1 »

lol so much help , thank you so much

User avatar
roadwanderer2
Posts: 4483
Joined: Thu Aug 08, 2013 4:03 am
Location: Tucson Arizona
Motorcycle: previously owned 83 GL1100A aspencade traded for a motorhome, 1981 honda GL500i silverwing interstate, 1974 yamaha xs400, 1974 Honda cb450 twin cam, 1983 honda vt30, 1982 honda 700 shadow, 1972 cb750four, and my first bike, a brand new 1982 honda CM400e. now own-1986 GL1200 aspencade SEi
Contact:

Re: 87 gl 1200 i fuel pump

Post by roadwanderer2 »

let me start off by saying........dude, don't be so impatient, sometimes it take a few days for someone to answer a post. 2nd, since you have an ECU on your bike, do you have an electrical service manual for it?. best thing you can do right now is get the service manual and check out the ECU trouble codes. that will point you in the right direction to finding out where your problem is. having an 86 SEi CFI with an ECU and thru some of the people here has taught me a lot. electrical problems are a nightmare to deal with trust me. i just finished having a problem with my bike's Tw sensor, but i couldn't have fixed it without the service manual and the good people on this site and a few from another site because im an electrical dummy. i hate electrical work.

don't worry, you'll get it straightened out before long.

stuart.

User avatar
virgilmobile
Posts: 9080
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: 87 gl 1200 i fuel pump

Post by virgilmobile »

Sorry I took so long....Been hanging sheetrock so I'll have a warm room to sleep in soon.The flood kinda ruined my house.
Your problems can be resolved given enough details and information exchange..I'll try to help with a few details pertaining to your comments.

[quote]" I checked plugs for fire the front was fireing but not the back,so I crossed wires on coils by jumping them now had fire on the rear plug "

"could this be because of the IGN pickup coils not telling the ECU not to let the fuel pump work ?"[/quote]

Yes...The 1200 uses ignition primary pulses to "enable" the fuel pump relay to operate as shown in this schematic below Not the ECU module...Thus "no spark on the rear..no power for the pump"
Note: the fuel pump "relay" does not provide continous power to the pump when there's spark...It's a load switch..You would only be able to measure voltage when the pump is actually energized...This lasts just about a half second..

[quote]So from what I've read it's the IGN pickup coils under the timing belts.Do you think that's what it is too ?[/quote]

This is the easiest to test and certainly will cause the rear cylinders to not have spark.The 2 wires for each pickup coil are color coded and can be located at the ignition module plug.

I would suggest a DVM measurment comparing the 2 pulse coil continuity...While your there inspect for contact corrosion..
2 possibilities present themselves with this information....
The bike won't run because of lack of fuel....
1...Lack of pulses from the rear cylinder pulse coils due to a bad electrical connection or defective pulse coil....
2.. A defective ignition module..
I did a easy test procedure for the 1200 pulse coils...Theres other methods too.viewtopic.php?t=11800
Your fuel pump can also be "on bike "tested" if you feel the need.
Attachments

pump relay
pump relay


pulse coils
pulse coils


ignition module
ignition module


User avatar
roadwanderer2
Posts: 4483
Joined: Thu Aug 08, 2013 4:03 am
Location: Tucson Arizona
Motorcycle: previously owned 83 GL1100A aspencade traded for a motorhome, 1981 honda GL500i silverwing interstate, 1974 yamaha xs400, 1974 Honda cb450 twin cam, 1983 honda vt30, 1982 honda 700 shadow, 1972 cb750four, and my first bike, a brand new 1982 honda CM400e. now own-1986 GL1200 aspencade SEi
Contact:

Re: 87 gl 1200 i fuel pump

Post by roadwanderer2 »

see? told you someone would answer your post eventually. kudo's to you virgil. glad to see your still here. how is it going with your home remodel? from the photos you've posted it looks like things are coming along pretty good.

stuart.

User avatar
virgilmobile
Posts: 9080
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: 87 gl 1200 i fuel pump

Post by virgilmobile »

The primary living quarters are finished.Its slow but steady.Just picked up the last of the sheetrock.About 1200 square feet of walls left to cover.


Need another bucket of screws and plenty of mud.I'll have this done in a few months.

User avatar
roadwanderer2
Posts: 4483
Joined: Thu Aug 08, 2013 4:03 am
Location: Tucson Arizona
Motorcycle: previously owned 83 GL1100A aspencade traded for a motorhome, 1981 honda GL500i silverwing interstate, 1974 yamaha xs400, 1974 Honda cb450 twin cam, 1983 honda vt30, 1982 honda 700 shadow, 1972 cb750four, and my first bike, a brand new 1982 honda CM400e. now own-1986 GL1200 aspencade SEi
Contact:

Re: 87 gl 1200 i fuel pump

Post by roadwanderer2 »

not meaning to hijack roncycle's thread, but im glad to hear that you're getting the job done, but let me ask you something........would it have been cheaper/easier to purchase a prefab and put it on a slab foundation instead of doing all that work, spending all that time and money? i know it's a lot of work going from almost the ground up again since you've already done it once, and because of someone else's negligence your having to do it again, and from what i've seen so far, you take pride in doing your rebuilding, and your doing a fantastic job, and i know the end results will justify the means, but im just curious.

stuart.

User avatar
ronscycle1
Posts: 60
Joined: Sat Oct 31, 2009 2:58 pm
Location: Kinmundy IL.
Motorcycle: 1987 gl 1200 I

Re: 87 gl 1200 i fuel pump

Post by ronscycle1 »

thank you so much for helping me, I ordered the source coils



Post Reply