Back firing into carbs

Discuss everything about Honda GoldWing. Feel free to ask any question related to GoldWing.

Moderators: CYBORG, Oldewing, robin1731, Forum Moderators

Post Reply
BurnsYoFace34
Chrome Member
Chrome Member
Posts: 163
Joined: Sun Mar 06, 2022 10:19 pm
Location: Akron, Ohio

Re: Back firing into carbs

#16

Post by BurnsYoFace34 »

Also how do we check the advanced
User avatar
CYBORG
Moderator
Moderator
Posts: 24537
Joined: Mon Jan 14, 2008 12:52 pm
Location: Muskegon mich

Re: Back firing into carbs

#17

Post by CYBORG »

I would use a timing light
1978 custom GL1000
1977 custom with 1200 engine
1985 gl1200
BurnsYoFace34
Chrome Member
Chrome Member
Posts: 163
Joined: Sun Mar 06, 2022 10:19 pm
Location: Akron, Ohio

Re: Back firing into carbs

#18

Post by BurnsYoFace34 »

So I have another dyna ignition system instead of the points. On the bike I have adjusted those or well timed it. But would that possibly have taken a shit an I not know it ? Should I try putting a new one in
User avatar
Fred Camper
Vice President
Vice President
Posts: 6889
Joined: Wed Aug 12, 2009 9:38 pm
My Album: http://www.ngwclub.com/gallery/v/wingmans/Jeff+Bozeman/
Location: Metro Detroit
Contact:

Re: Back firing into carbs

#19

Post by Fred Camper »

I would stick with the points, they are working if one cylinder will fire and you have that. No change in points will help IMHO.
Proud member of the NGW Cartel (Rochester MI)
1977 GL1000 BADDOG (April 2012 BOTM)
1976 LTD - '993 LTD...and so it begins'

You should remember that it's peace of mind you're after and not just fixing the machine. R.Pirsig
BurnsYoFace34
Chrome Member
Chrome Member
Posts: 163
Joined: Sun Mar 06, 2022 10:19 pm
Location: Akron, Ohio

Re: Back firing into carbs

#20

Post by BurnsYoFace34 »

I don't have points there's a dyna ignition on the bike already an I got a spare dyna ignition
BurnsYoFace34
Chrome Member
Chrome Member
Posts: 163
Joined: Sun Mar 06, 2022 10:19 pm
Location: Akron, Ohio

Re: Back firing into carbs

#21

Post by BurnsYoFace34 »

Ok so I'm trying to check timing an I have the dyna ignition in have the red wire going to constant power with the ignition key in fuse box. So trying to check timing right ok have the motor in fire 1 light connected to yellow blue wire which is for cyc 1-2 start moving the dyna back an forth nothing try rotation all the way around 360 still nothing checknfor power to the dyne test like comes on but nothing for spark or fire wtf were or what am I missing
User avatar
Whiskerfish
President
President
Posts: 36852
Joined: Thu Feb 16, 2006 9:34 pm
My Album: http://www.ngwclub.com/gallery/v/wingmans/whiskerfish/
Location: Norfolk Va

Re: Back firing into carbs

#22

Post by Whiskerfish »

Working off that vid the idle is way too low. like half what it needs to be.
"Agreement is not a requirement for Respect" CDR Michael Smith USN (Ret) 2017
"The book is wrong, this whole Conclusion is Fallacious" River Tam
2008 GL1800 IIIA "TH3DOG"
1975/6/7/8/9 Arthur Fulmer Dressed Road bike
1975 Naked Noisy and Nasty in town bike
and a whole garage full of possibilities!!

Psst. oh and by the way CHANGE YOUR BELTS!!!!
BurnsYoFace34
Chrome Member
Chrome Member
Posts: 163
Joined: Sun Mar 06, 2022 10:19 pm
Location: Akron, Ohio

Re: Back firing into carbs

#23

Post by BurnsYoFace34 »

After re checking the belts an wires it's now backfiring back into carbs again but this time it's both sides now like it to far advanced or something
User avatar
gltriker
Honored Life Member
Honored Life Member
Posts: 5053
Joined: Fri Sep 24, 2010 9:11 pm
Location: central NY State

Re: Back firing into carbs

#24

Post by gltriker »

BurnsYoFace34 wrote: Sat Mar 04, 2023 7:20 pm
Ok so over the winter I found out I had a bent intake valve on number 2 cyl. [/color]So an awesome guy cfairwheather shipped me some parts which I'm really appreciative of. An some new coils plugs an wires head gaskets since I had to replace the head I actually had a donor bike it was a 81 gl1100 but I was told the heads are the same just use the cam shaft from the original so after some cleaning up an maken sure the valves weren't stuck got the newish head on there. The only thing I did to the right side or cyl 1 an 3 was remove the old head gasket an put the new one on I don't recall removing the cam shaft from the head. But I did swap cams on the left side cyl 2 an 4 put new belts on the bike as well used the how to from octane for reference. Made sure crank was tdc 1. An the cams were on the marks on the cam cover. I'm at a loss idk what wrong any help or advice would be great thanks

Both cylinder heads weren't completely disassembled? Valve heads and their matching valve seats weren't cleaned and inspected for wear and probability of being slightly contact damaged (bent), as well. ???
gltriker wrote: Sun Oct 16, 2022 6:28 pm
Compression test all 4 cylinders, Again. Focus
Make sure the throttle grip is twisted and held wide open when compression testing. The choke button is fully pushed into its off position, too. Fully charged battery. Don't bother counting a recommended number of rotations.

Crank the engine until the compression testing gauge pointer needle won't climb any higher on the numbered gauge face.
Will take no more than 12ish seconds, maximum.
You keep questioning advanced ignition timing. No.
Get a compression testing gauge busy.
Yes. The cylinder compression testing instructions are still the same as I had given you, Sun Oct 16, 2022 6:28 pm.

Cylinder pressure leakdown testing is another diagnostic troubleshooting procedure you should learn and utilize, too.
Last edited by gltriker on Thu May 04, 2023 7:59 pm, edited 8 times in total.
Cliff (74yrs ;) )

Keep your eyes and ears open and you'll learn something new, everyday. tumb2

New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^ :oldies

RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi tumb2
"Can't see the paint when your looking thru the handlebars..........." -Oldewing ;)
"I'd rather Ride than Shine" -RAT tumb2 Me Too!!

Cliff

'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM :shock: https://nakedgoldwingsclub.com/forum/page/Welcome

previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
User avatar
CYBORG
Moderator
Moderator
Posts: 24537
Joined: Mon Jan 14, 2008 12:52 pm
Location: Muskegon mich

Re: Back firing into carbs

#25

Post by CYBORG »

compression test can answer a lot of questions. PAY ATTENTION. We need numbers, if you want help
1978 custom GL1000
1977 custom with 1200 engine
1985 gl1200
BurnsYoFace34
Chrome Member
Chrome Member
Posts: 163
Joined: Sun Mar 06, 2022 10:19 pm
Location: Akron, Ohio

Re: Back firing into carbs

#26

Post by BurnsYoFace34 »

Copy I will get those tests asap. I did a compression test last yr an the numbers were like 75 psi each but that was before I had actually rode it an bent the valve never did one after that but I will here soon
User avatar
gltriker
Honored Life Member
Honored Life Member
Posts: 5053
Joined: Fri Sep 24, 2010 9:11 pm
Location: central NY State

Re: Back firing into carbs

#27

Post by gltriker »

BurnsYoFace34 wrote: Mon Apr 24, 2023 9:06 am Copy I will get those tests asap. I did a compression test last yr an the numbers were like 75 psi each but that was before I had actually rode it an bent the valve never did one after that but I will here soon
good action1 ... click on this link to my engine's testing information:
viewtopic.php?f=30&t=39996&start=360

study Post #367 crossy.gif . "Trike's engine, cylinder compression testing video and photos"

AND
viewtopic.php?f=1&t=76923 <<<<...must read, too "Real world cylinder compression?"

gltriker wrote: Sat Apr 22, 2023 7:23 pm Cylinder pressure leakdown testing is another diagnostic troubleshooting procedure you should learn and utilize, too.

study Post #364 . crossy.gif Trike's engine, cylinder leak down rate test results
Cliff (74yrs ;) )

Keep your eyes and ears open and you'll learn something new, everyday. tumb2

New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^ :oldies

RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi tumb2
"Can't see the paint when your looking thru the handlebars..........." -Oldewing ;)
"I'd rather Ride than Shine" -RAT tumb2 Me Too!!

Cliff

'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM :shock: https://nakedgoldwingsclub.com/forum/page/Welcome

previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
BurnsYoFace34
Chrome Member
Chrome Member
Posts: 163
Joined: Sun Mar 06, 2022 10:19 pm
Location: Akron, Ohio

Re: Back firing into carbs

#28

Post by BurnsYoFace34 »

Yall want the good news or bad news. Well good news is ibdid a compression test today. Bad news 3 outa 4 cylinders held 0 compression. An number 4 cyclinder had just over 75 psi
User avatar
gltriker
Honored Life Member
Honored Life Member
Posts: 5053
Joined: Fri Sep 24, 2010 9:11 pm
Location: central NY State

Re: Back firing into carbs

#29

Post by gltriker »

BurnsYoFace34 wrote: Tue Apr 25, 2023 8:39 pm Yall want the good news or bad news. Well good news is ibdid a compression test today. Bad news 3 outa 4 cylinders held 0 compression. An number 4 cyclinder had just over 75 psi
That's too bad news. Pull both cylinder heads and start posting photos of what you find, from this point on . Deal?

Burns- Hold on. Let us know what YOUR plan is.

I'm curious about your valve lash clearance adjustments and observations.
Last summer? when you initially checked/set the valves' lash clearance at 0.004inch, Did you find more than one or two valves had required more than a few thousandths change in clearance adjustments? Same question when you readjusted the valves to 0.006inch.
Yes?
A *bent* off-center valve head will translate as having mysteriously increased valve lash clearance when its 'face' is no longer making full concentric contact with the valve seat.
Last edited by gltriker on Wed Apr 26, 2023 4:46 am, edited 2 times in total.
Cliff (74yrs ;) )

Keep your eyes and ears open and you'll learn something new, everyday. tumb2

New users please visit our "Shop Talk" for common tips and help: <---jdvorchak
http://www.ngwclub.com/forum/page/ST
^^^^^^^click up here^^^^^ :oldies

RE: a thorough fuel tank cleaning
"And your carbs will thank you. They no longer live down stream from a sewage plant." -gregforesi tumb2
"Can't see the paint when your looking thru the handlebars..........." -Oldewing ;)
"I'd rather Ride than Shine" -RAT tumb2 Me Too!!

Cliff

'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
October,2017 BOTM :shock: https://nakedgoldwingsclub.com/forum/page/Welcome

previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
1980 CB900 Custom (triked) 1997-2003 .... R.I.P.
BurnsYoFace34
Chrome Member
Chrome Member
Posts: 163
Joined: Sun Mar 06, 2022 10:19 pm
Location: Akron, Ohio

Re: Back firing into carbs

#30

Post by BurnsYoFace34 »

When I checked valve lash I set them all to the .006 then I rotated the engine several times an rechecked clearance several were loose again So I tightened them an re rotated the engine again an checked valves till there was just the the .006 clearance
Post Reply
  • Similar Topics
    Replies
    Views
    Last post

Return to “GoldWing Tech Discussions”