engine idles way too high


Information and questions on GL1200 Goldwings (1984-1987)
  • Sponsored Links
User avatar
roadwanderer2
Posts: 4108
Joined: Thu Aug 08, 2013 4:03 am
Location: sweetwater, Tennessee
Motorcycle: 83 GL1100A aspencade, previously owned, 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. and a new to me 1986 GL1200 aspencade SEi
Contact:

engine idles way too high

Postby roadwanderer2 » Sat Nov 14, 2015 8:13 pm



ok, new question.... so there i was, crimping the female crank sensor wires ends tighter so they wont come detached from the sensor, put it all back together after i had to take the lower fairing skirts and radiator off to get to the wires, started the bike up, ran ok, went to take it out for a quick run to the supermarket, when i went to stop at the stop sign about a block from my house, it wanted to stall, so i throttled it to keep it running, then all of a sudden it started to idle way up to around 2,700 rpm's. i couldn't get it to idle down, so when i got home, i took a Phillips screwdriver and tried to lower the idle. well the only way i could lower it was to put my thumb onto the throttle linkage and hold it. as soon as i did that, it idled down to about 750 rpm's, so i tried to idle it up to around 850, and when i did that, the idle jumped back up to 2,700 rpm's. i cant get it to idle down, and if i do, it wants to shut off.

i have no idea why this happened, so my question i guess would be this........is it possible that i have the crank sensor wires connected backwards? does this make any sense?

anyone have any ideas?

stuart.



User avatar
Aussie81Interstate
Posts: 682
Joined: Thu Nov 27, 2014 2:34 am
Location: Penrith Australia
Motorcycle: 1982 CX500 Turbo (restoration project)
1981 GL1100 Interstate (sold)
1988 GL1500

Re: engine idles way too high

Postby Aussie81Interstate » Sat Nov 14, 2015 9:21 pm

Not sure on the crank sensor wires.

Have you lubricated your throttle cables? or altered the routing? - jumping up in idle sounds like a carb/cable issue or a vacuum leak maybe?

User avatar
roadwanderer2
Posts: 4108
Joined: Thu Aug 08, 2013 4:03 am
Location: sweetwater, Tennessee
Motorcycle: 83 GL1100A aspencade, previously owned, 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. and a new to me 1986 GL1200 aspencade SEi
Contact:

Re: engine idles way too high

Postby roadwanderer2 » Sat Nov 14, 2015 9:33 pm

hey Aussie, i haven't touched anything other than the crank sensor and wires. i read in the supplemental manual that low coolant could have something to do with it because the coolant isn't getting to the air valve? and something called a reed valve?. tomorrow im gonna put more antifreeze in the radiator because i might have lost more than what i put back into the radiator and switch the sensor wires around. funny this only started when i put the wires back onto the crank sensor.

stuart.

User avatar
roadwanderer2
Posts: 4108
Joined: Thu Aug 08, 2013 4:03 am
Location: sweetwater, Tennessee
Motorcycle: 83 GL1100A aspencade, previously owned, 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. and a new to me 1986 GL1200 aspencade SEi
Contact:

Re: engine idles way too high

Postby roadwanderer2 » Sun Nov 15, 2015 7:05 am

can anyone tell me where the heated air valve for the cold fast idle is located? is it near the radiator and could it have possibly been disconnected when i pulled the radiator away from the water pump housing?

stuart.

User avatar
roadwanderer2
Posts: 4108
Joined: Thu Aug 08, 2013 4:03 am
Location: sweetwater, Tennessee
Motorcycle: 83 GL1100A aspencade, previously owned, 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. and a new to me 1986 GL1200 aspencade SEi
Contact:

Re: engine idles way too high

Postby roadwanderer2 » Sun Nov 15, 2015 9:43 am

ok guys, here is what i found. after removing the lower fairing panels AGAIN and the horns AGAIN to get to the radiator so i could remove it AGAIN, :( i reversed the wires on the crank pulse sensor and believe it or not, when i started the bike up, (and i know i shouldn't have done it with the radiator still disconnected), it idled at its normal rpm's, so it is possible to have the wires connected backwards. im so mad at myself i could spit nails :x , but hey, at least i know how the horns and lower panels bolt on LOL.

question, instead of using the rubber "O" ring that fits into the lower water pump housing, can i use a regular water pump housing gasket, the same as on a car?

stuart.

User avatar
roadwanderer2
Posts: 4108
Joined: Thu Aug 08, 2013 4:03 am
Location: sweetwater, Tennessee
Motorcycle: 83 GL1100A aspencade, previously owned, 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. and a new to me 1986 GL1200 aspencade SEi
Contact:

Re: engine idles way too high

Postby roadwanderer2 » Sun Nov 15, 2015 10:53 am

ok, FYI, if anyone is looking for the lower radiator hose to water pump cover "O" ring, it can be found/ordered from advance auto parts stores. the part number is....641331/3490882. just thought you guys that need one can find it there and its only 99 cents +tax, as apposed to ordering it from an outside source such as partszilla or any other bike website and having to wait for it to be delivered, and its a perfect fit. i bought one and ordered 5 more just to be on the "safe side" in case i need another one.

stuart.

royal57
Posts: 26
Joined: Sat Feb 13, 2016 7:16 pm
Location: mpls Mn.
Motorcycle: 1983 GL1100 Aspencade 83 Yahama midnight virago 750

Re: engine idles way too high

Postby royal57 » Fri Apr 29, 2016 7:31 pm

I have had the carbs off 2 times now it still idles high.do you have pictures of the wires you changed? It idles at 2gs.I turned the 4 carb screws in 1 turn each it came down to 16/18 gs Than hit the main idle adjustment.it all the way out,but it its still 16/18 gs. I could pull 1 carb boot off at a time.and make sure I get a good seal on each one. I want to make sure the wring is right first.

User avatar
Fatwing Chris
Posts: 741
Joined: Thu Oct 21, 2010 6:10 pm
Location: Ont.,Canada
Motorcycle: 2004 ABS Model Goldwing

Re: engine idles way too high

Postby Fatwing Chris » Thu May 05, 2016 8:28 pm

royal57 wrote:I have had the carbs off 2 times now it still idles high.do you have pictures of the wires you changed? It idles at 2gs.I turned the 4 carb screws in 1 turn each it came down to 16/18 gs Than hit the main idle adjustment.it all the way out,but it its still 16/18 gs. I could pull 1 carb boot off at a time.and make sure I get a good seal on each one. I want to make sure the wring is right first.


There's a vacuum advance unit on the back of the motor that runs off of the #3 carb.If the bearing in it is dry or fails then the idle will hang up also.


If I'da known it would last this long,I'da taken better care of it.
Chris
Double Dark
Darkside # 1602


Return to “GL1200 Information & Questions”




Who is online

Users browsing this forum: MSNbot Media [Bot] and 2 guests