bike barely runs


Information and questions on GL1500 Goldwings (1988-2000)
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theok
Posts: 6
Joined: Fri Oct 18, 2019 6:18 am
Location: United States
Motorcycle: 1988 honda goldwing gl1500

bike barely runs

Post by theok »



i have an 88 goldwing 1500. hit a bump and lost right side of motor.have had alot of work done since to no avail. had new timing belts, pulse generators ,coils and plugs,had carbs rebuilt and seems i have no fuel going to one side of motor. could ecm be bad or bas be failing. at my wits end as well as my wallet. any help would be appreciated



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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: bike barely runs

Post by virgilmobile »

Spark.. compression..fuel..
Which one is bad?

theok
Posts: 6
Joined: Fri Oct 18, 2019 6:18 am
Location: United States
Motorcycle: 1988 honda goldwing gl1500

Re: bike barely runs

Post by theok »

fuel. have spark and compression but no fuel to right side of motor

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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: bike barely runs

Post by virgilmobile »

But the carbs were rebuilt...How is it possible that the same side still won't run??
At wits end... Somebody missed something..
If you had me "look" at this I would ignore everything that had been done.Only because I can't verify anything.
With that in mind ill suggest the same.
Ignore everything that been done.
Pretend this is the first time for you as well (your too deep in the rabbit hole) and get back to the basics.
The owner hit a bump..bike doesn't run well.
What to do...
I always do the easy stuff first.
Start it and idle for 20 seconds Lightly tap the headers.check the temp.VERIFY which cylinders do not fire.
Idle the bike and pull each plug wire 3/4" or so and listen to the spark...Nice and robust snapping?
Pull all 6 plugs and do a proper compression test of all cylinders..with a real compression gauge.Are they all near equal and good?And I mean above 150 psi.
Pull the air cleaner and run the bike..Actually look at the slide needles.As you rev the engine,do you see fuel coming out of the brass jets and the slides rise?
Basics.gas compression spark

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ct1500
Posts: 1391
Joined: Wed Nov 10, 2010 8:09 pm
Location: Glastonbury,CT
Motorcycle: 1988 GL1500
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Re: bike barely runs

Post by ct1500 »

theok wrote:
Fri Oct 18, 2019 6:31 am
i have an 88 goldwing 1500. hit a bump and lost right side of motor.have had alot of work done since to no avail. had new timing belts, pulse generators ,coils and plugs,had carbs rebuilt and seems i have no fuel going to one side of motor. could ecm be bad or bas be failing. at my wits end as well as my wallet. any help would be appreciated
First off, get rid of the parts replacer. How did you determine there is no fuel getting to the right side? Start with my diagnostic routine.
https://www.goldwingfacts.com/forums/2- ... -test.html
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

theok
Posts: 6
Joined: Fri Oct 18, 2019 6:18 am
Location: United States
Motorcycle: 1988 honda goldwing gl1500

Re: bike barely runs

Post by theok »

when i bought this bike, i knew id be dropping money into it. thats not the problem. as you said , i ignored everything, and checked all the basics first, compression was good on all cylinders, spark was good on all plugs, fuel delivery was erratic from the start. ran to rich from time of purchase. knew i had a carb problem. but wanted to replaced the vitals cause i wanted a bike i could ride into my golden years and enjoy with the wife. am i an idiot? jury is still out on that. but found out when carbs were rebuilt, not all parts were replaced. was told most everything was just soaked and cleaned and not replaced. so it seems they werent rebuilt. just looking for advice on what else i could do.

theok
Posts: 6
Joined: Fri Oct 18, 2019 6:18 am
Location: United States
Motorcycle: 1988 honda goldwing gl1500

Re: bike barely runs

Post by theok »

also, if yall know anyone in or around my location who could help me out, would be glad to speak with them

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DenverWinger
Posts: 1522
Joined: Thu Jun 23, 2011 2:20 pm
Location: Denver, CO
Motorcycle: (s)
1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
Past rides
1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: bike barely runs

Post by DenverWinger »

So what exactly IS your location? Your profile only says "United States"......
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark

theok
Posts: 6
Joined: Fri Oct 18, 2019 6:18 am
Location: United States
Motorcycle: 1988 honda goldwing gl1500

Re: bike barely runs

Post by theok »

elizabethtown, kentucky

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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: bike barely runs

Post by virgilmobile »

You've done a good job.You have,by process of elimination, determined that the fuel system is the problem.

Before pulling the carbs again do check the fuel supply.

Plugged fuel filter(poor fuel flow to the carbs).
Bypass the vacuum fuel cutoff valve and check fuel flow to the carbs(fuel pump).

Just a trickle of fuel can get into one carb and leave the other dry.

If I were to just guess about the carbs..
Stuck float..no fuel in that carb..
Plugged jets..fuel ok but none getting into the engine.
Also the carb rubber couplers..They can get hard and vacuum leak.
And as always..replace any vacuum lines that have gotten hard or deteriorated at the 90° bends.Especially the one under the black thermal mat(under the carbs).

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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: bike barely runs

Post by virgilmobile »

Just a side note.
As I ran my 88 around for a few months..
One day it ran very bad...
I managed to get it to work...I found the right side(all3) did not fire.
Sheesh...been running great for months.
I located the carb drain tube and cracked open the drain plug on the left carb...fuel flowed right out..
When I opened the right drain plug...Nothing...wait..a drop...what???..water.!!!!.
Waited a hour...a couple of drops..
I used the air compressor and blew air into the vent tube...A bunch of water came out...
Problem solved...Condensation in the vent tubes

theok
Posts: 6
Joined: Fri Oct 18, 2019 6:18 am
Location: United States
Motorcycle: 1988 honda goldwing gl1500

Re: bike barely runs

Post by theok »

had an electric fuel pump installed. both jets are shooting fuel in carbs but back firing through right carb. back to square 1

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ct1500
Posts: 1391
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Location: Glastonbury,CT
Motorcycle: 1988 GL1500
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Re: bike barely runs

Post by ct1500 »

Backfire through the intake on right side could be a crossed/misfiring plug wire. Plug wires are numbered 1,3 and 5 for right side front to back, check that they are correct. If correct there, although unlikely someone could have attached them wrong at the coils. Right coil is 1, center 3 and left 5. The previous is more likely if popping is occurring at idle speeds. If popping during acceleration of throttle then it is more likely a lean condition followed by a too rich condition. A quick inspection of the plugs will give a clue along with looking down carb throat while running observing fuel dribbling down the sides of throat for a flooding condition compared to left side. The controlled addition of some carb clean spray using straw to the right carb intake during this popping event will confirm a lean condition if popping ceases and engine RPM/power/smoothness increases.


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

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