85 Aspencade Sei


Information and questions on GL1200 Goldwings (1984-1987)
  • Sponsored Links
User avatar
nightair
Posts: 23
Joined: Wed Jun 06, 2012 11:37 pm
Location: Medicine Hat, Alberta, Canada
Motorcycle: 1985 Aspencade Special Edition

85 Aspencade Sei

Postby nightair » Thu Jun 28, 2012 1:00 pm



I need to buy a new ECM for the fuel injection on my 1985 Aspencade Limited Edition. Does anyone have one for sale ???



User avatar
WingAdmin
Site Admin
Posts: 17046
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: 85 Aspencade Sei

Postby WingAdmin » Thu Jun 28, 2012 2:24 pm

That's a fairly rare item...so don't expect to find it cheap. eBay is probably your best bet.

User avatar
virgilmobile
Posts: 7646
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 Aspencade Sei

Postby virgilmobile » Thu Jun 28, 2012 3:09 pm

Im guessing it's rare because they don't fail to often.
Are you sure it's bad.Your not just throwing parts in it with the hopes that one will fix your bike.

Thats our nature....sticking our nose in your buisness.....just asking ya know.

User avatar
nightair
Posts: 23
Joined: Wed Jun 06, 2012 11:37 pm
Location: Medicine Hat, Alberta, Canada
Motorcycle: 1985 Aspencade Special Edition

Re: 85 Aspencade Sei

Postby nightair » Thu Jun 28, 2012 7:15 pm

Thank you for everyones input, I never take info as bad. We have checked the vac lines and press, the fuel regulator, map sensors, injectors, system voltage, grounds, and ECM output voltage. The only way to keep the Sei from dumping fuel at idle is to disconnect the fuel pump temporarily. We found the ECM output voltage low. I can have the mechanic working on the bike post more of his findings as per the Sei supplement but as of today he thinks the problem is actually with the ECM.
Any other suggestions are greatly welcomed. Thanks. Keith

User avatar
nightair
Posts: 23
Joined: Wed Jun 06, 2012 11:37 pm
Location: Medicine Hat, Alberta, Canada
Motorcycle: 1985 Aspencade Special Edition

Re: 85 Aspencade Sei

Postby nightair » Thu Jun 28, 2012 7:38 pm

Is there anyone out there with an Sei that would be so kind as to see what their vac press is at idle and also what their output voltage signal from the ECM is when running. Thank you.

User avatar
virgilmobile
Posts: 7646
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 Aspencade Sei

Postby virgilmobile » Thu Jun 28, 2012 7:50 pm

Can I assume the bike runs great but loads up on gas at a idle???
The low volts should be of no interest.as I understand a FI system,the injectors are pulse duration to control fuel amount.if the injectors are leaking,weak,or even dragging inside, they may not snap shut fast enough to limit the fuel spray.The fact it runs ok would lead me to believe the ECM is working.the only way to really tell is to put a scope across the injector leads and watch the pulse duration.Just measuring the volts won't show how long they stay open or if the ECM is really changing the pulse width.
I know. This isn't by the book but it will definatly determine what's bad.
I'd hate to hear about you spending $300 on a ECM when the injectors are worn sloppy.not bad, just not crisp.

User avatar
nightair
Posts: 23
Joined: Wed Jun 06, 2012 11:37 pm
Location: Medicine Hat, Alberta, Canada
Motorcycle: 1985 Aspencade Special Edition

Re: 85 Aspencade Sei

Postby nightair » Thu Jun 28, 2012 10:16 pm

The engine runs rough ALL the way thru the range. We unplugged the elec conections on all the injectors and turned the bike over, they didn't leak at all. We measured the injector resistance which is good, the ECM doesn't have any codes. We ran the engine, disconnected the fuel pump and applied 20" of vac to the injectors, the engine will run smooth but of course will quit if we try to give it throttle as its running only on fuel suction. We can disconnect each of the ECM inputs such as MAP, temp etc and the ECM will flash a code for each of the designated inputs, which to me shows the ECM is recognizing the fault. The manual is pointing to the ECM as the fault. The engine only has 34000 kms on it. If it was only one cyl it would be an injector but it seems all of them are running rich. All of the injectors, TPS etc are within the range as per the manual. We slowly twisted the TPS while measuring the resistance and it's straight as an arrow. What we feel may have happened is the previous owner either put a battery charger with too much output and fried the ECM or he was fiddling with wiring somewhere. The voltage regulator looks as though it got hot at some point in its life. I am going to dig deeper into wiring to see if it's kosher.

User avatar
virgilmobile
Posts: 7646
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 Aspencade Sei

Postby virgilmobile » Fri Jun 29, 2012 10:14 am

Can you clarify where you applied 20" of vacuum.?
All the digging,I came up with what seems to be your problem.
Somewhere,there is a vacuum leak.The ECM is receiving information from the sensors,just not the right info.Thus the "no code".The ECM is responding directly to the information provided by the sensors.
The sensors are giving inaccurate voltages.
Here's some info to look over.If this doesn't help,let us know.

User avatar
virgilmobile
Posts: 7646
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 Aspencade Sei

Postby virgilmobile » Fri Jun 29, 2012 12:56 pm

Here's more info.It appears that the PB sensors are tied with a "T" Under the plenum box and also tie into the afterburn diaphragm.
Look at the vacuum on this line.If there is a leak,it will affect both sensors.
Another test....use a hose attached to both sensors,add a "T" and a vacuum pump.Draw 9.5" vacuum and run the bike.
If all the rest of the system is OK it will idle normal.As the vacuum is reduced it should start to load up on fuel.If it does,the ECM is working and you don't have the proper vacuum on the sensors during idle.

User avatar
nightair
Posts: 23
Joined: Wed Jun 06, 2012 11:37 pm
Location: Medicine Hat, Alberta, Canada
Motorcycle: 1985 Aspencade Special Edition

Re: 85 Aspencade Sei

Postby nightair » Fri Jun 29, 2012 1:09 pm

Wow. Thank you for the support. I will be back home tonight although I am in contact with the mechanic constantly. It's great people who make the rest of us look simply good. Lol

User avatar
virgilmobile
Posts: 7646
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 Aspencade Sei

Postby virgilmobile » Fri Jun 29, 2012 1:25 pm

My thought is when you applied 20" vacuum.....That forced the sensor to feed the ECM with the voltage needed for a idle.Now it should only need 9.68" to do the same..but that is on both sensors.
If the voltage can't be seen on the PB sensors(both of them) with that vacuum,they are bad.
I'm thinking more along the lines that there isn't enough vacuum on both sensors to get the volts to the 1.2-1.4 volt range at a idle.
A leak would also upset the entire range too,as the voltage wouldn't be a accurate representation of the RPM.and load.

BEWARE....I have never worked on one and this info is just theory based on your reported test results.

I've got my fingers crossed.

User avatar
nightair
Posts: 23
Joined: Wed Jun 06, 2012 11:37 pm
Location: Medicine Hat, Alberta, Canada
Motorcycle: 1985 Aspencade Special Edition

Re: 85 Aspencade Sei

Postby nightair » Wed Jul 04, 2012 1:53 pm

UPDATE: Heres what we tested and found.
#1 The vac sensors tested as they should both electrically and under pressure. You could have one of them faulty yet the ECU wont show a fault as its taking both of them and giving an average reading to the ECU.
#2 The sensors were disconnected and a hand vac pump T'd in to simulate idle vac == the injectors would still pour fuel.
#3 The injectors were removed and checked for leaks , spray pattern, and electrically. OK
#4 Each fault sensor on the ECU was tested by disconnecting it and verifying the fault light. OK
#5 Fuel regulator, fuel pump and their associated lines were checked for blockage. OK
#6 TPS, Inlet temp checked. OK
#7 The refrerence wire coming from the ECU only showed 3.5 to 4 volts MAX when it should read no less than 5 volts. This was our first major indication of an ECU failure. You can test this by getting a good variable power source and putting 5 volts into that reference wire going to the sensors and either leaving them connected or applying 10'' vac to them. If the motor runs good then you know the ECU is at fault.

There must have been a Gremlin in the ECU because after being completely disconnected from any power and after carefully probing the circuit boards the ECU was plugged back in and the motor fired up and purrs like a kitten. I had allready ordered another ECU and plan to keep it as a spare just in case.

All in all this Gremlin has benefited our forum as it now provides another level of troubleshooting for future reference. I thank everyone who provided assistance, that awesome !!!!!!
Thanks to Rex McCarthy from Pro Power Engines here in Medicine Hat. He is amazing.
Thanks to Virgilmobile for his incredible electrical skills and troubleshooting methods. !!!!




Return to “GL1200 Information & Questions”




Who is online

Users browsing this forum: No registered users and 2 guests