strange fuel pump issue


Information and questions on GL1500 Goldwings (1988-2000)
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sweptwing
Posts: 14
Joined: Thu May 31, 2018 4:57 pm
Location: Lincoln, NE
Motorcycle: 1988 GL1500 / 1990 GL1500

strange fuel pump issue

Post by sweptwing »



Hey everyone. Just purchased another 1500 Wing with 60K miles. Kept and plan to keep my 88 with 112K miles too. Not sure why I need two but I get attached quickly. Already changed the timing belts. My 88 when I turn the key on I hear the fuel pump run usually briefly but still can here it. The 90, nothing. I takes awhile to start when cold and seems much more cold blooded than the 88 but will run well once warmed up. All I hear when I click the key on is a single click of a relay. Any ideas of what I should check or did they make a change in these that makes this a normal scenario? Thanks again everyone



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DenverWinger
Posts: 1568
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: strange fuel pump issue

Post by DenverWinger »

Think beginning in '90 the pump doesn't run until you hit the starter button. No relay for the pump after '90 either, pump power comes direct from the ICU.
♫ 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

sweptwing
Posts: 14
Joined: Thu May 31, 2018 4:57 pm
Location: Lincoln, NE
Motorcycle: 1988 GL1500 / 1990 GL1500

Re: strange fuel pump issue

Post by sweptwing »

That's awesome news. I wouldn't think it would run at all without the fuel pump working am I correct? Does not appear to me it could gravity feed anything from the way its laid out. Thank you very much for that reply. Safe riding.

User avatar
DenverWinger
Posts: 1568
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: strange fuel pump issue

Post by DenverWinger »

They CAN gravity feed if the tank is full, but generally speaking, if the engine is running, it's because the fuel pump is running, too :D
♫ 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

User avatar
bluthundr31
Posts: 566
Joined: Tue Jul 11, 2017 11:43 pm
Location: Morgan Hill, CA.
Motorcycle: 1991 GL1500 Interstate (Cinnamon Beige)

Re: strange fuel pump issue

Post by bluthundr31 »

Denverwinger nailed it, , , '88 & '89 had a fuel pump relay that would power the fuel pump for about 2 seconds when the key was turned on, and you usually could hear the pump. Beginning in '90 (and to the end of the "line" in '00), Honda removed that relay, and began sending power to the fuel pump from the ECU when the key is on, AND the start button is pushed. Your fuel pump puts fuel into the carbs as the start button is pushed, and then the ECU continues to power the pump when the engine starts running.

sweptwing
Posts: 14
Joined: Thu May 31, 2018 4:57 pm
Location: Lincoln, NE
Motorcycle: 1988 GL1500 / 1990 GL1500

Re: strange fuel pump issue

Post by sweptwing »

Perfect. Thank you all for the help. Always learning about these machines and so far having allot of fun doing it. They can be a challenge for sure in a few places but what a well built bike. Safe riding everyone.



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