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vacuum / idle question troubleshooting

  • Thread starter Thread starter maro
  • Start date Start date
M

maro

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this is for 82 GS1100E

Basically the bike will only idle on choke. While the choke is on and the bike is running I can rev it just fine. It dies when choke is closed. I sprayed carb cleaner in and around all boots, etc.... no surging.

That said I'm thinking it's either:

1. A cracked vacuum hose (the very tip where it hits the nipple looked cracked, but I still put it on snug and tight beyond the crack :rolleyes:.) I'm going to by a 1/4 vacuum hose tonight.

2. A clogged pilot jet ..We had the bike running a couple time after the new carbs were installed, perhaps some gunk got sucked from the tank and clogged the jet. Petcock is operating normal and should have a screen so I'm thinking no on this, but ya never know.

3. Though my battery is charged and turning the bike over, the level is a bit low. I have distilled water ready to fill the level back up. Would this really effect the idle though?

anymore thoughts on what it could be?

thanks
 
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I would bet on the clogged pilot jet, or a clog somewhere else in the pilot system.
 
Where did these “new” carbs come from? Unless you know their history, I suggest a full tear down, soak in carb dip, and replacement of all internal O-rings. It’s very difficult to diaganosis problems unless you have a solid foundation to build from – and clean carbs are a good start.
 
carbs were completely rebuilt from top to bottom from Chef. They look great and he has been wonderful about answering any and all my questions. It was a pleasure to do business with him!

If its the pilot it could have only been clogged from the short trip the carbs ran when we put them on. But sometimes that's all it takes, I was running some old gas intitially. That's why I'm trying to weed out any other possibilites first.... before ripping into them. I have a feeling it's something ridic like a crakc in the vacuum. Would that cuase these symptoms. I'll just assume it would, trying to see what else it could be..
 
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I have to back you up abit.
Why where the carbs replaced?
Have you set the base idle screw? The larger knurled knob between the carb bank?
Can be just a low idle. IT will run on choke because choke adds fuel and air.
 
rapidray said:
Have you looked at maybe the idle screw needs to be turned up? Ray.
Click to expand...


I've played with the idle screw also, however, it is to no avail, meaning it doesn't seem to be effecting the idle (while the choke is on remember) one way or another.

Question. To troubleshoot the idle screw further and from scratch, should I start with it bottomed out. That is, turned clockwise as far as It will go and then start turning it counter clockwise slowly? or vice versa?
 
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More than likely Chef did a static bench sync.
If you hold the throttle by hand, can you turn off the choke, (after its warm) and keep the idle at around 1100?

Why did you do the carbs. How did it idle before?
 
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maro said:
He did, then they were synched properly once they were on.
Click to expand...
You say they were synched properly on your bike? :-k

If Chef synched them on his bike, they are likely close, but will not be properly synched for your bike.

And, you have also said that you can't take the choke off, or it will die. You just can't do a sync with the choke on. :o

.
 
Ok, I re-read your original post and added your last post.
Am i to understand that Chef had it running and idling properly. And after some run time and several startups it failed to idle? But, it did idle when the the carbs where first installed?
 
Steve said:
You say they were synched properly on your bike?
And, you have also said that you can't take the choke off, or it will die. You just can't do a sync with the choke on. :o

.
Click to expand...

Okay, Dunaeage and I put the carbs on. The next day Duane sychned them up and rode to my house. (about 25 miles) I then sat bitch and he drove be back to his house (another 25 miles). I then rode home .....so I guess that's actually about 75 miles. He mentioned the idle was set a tad high.

I have since, played with the idle knob :eek:. and have taken notice to the crappy vacuum hose. Now, a few days later. I'm having the idling issues at start. which is where we are here.

I would like to add, that Duane's help has been invaluable and ridiculous. Dude goes above and beyond. Just want to give him a shout here as he as taken care of 90% of the issues I've had pertaining to this bike since I got it in october. That said, I cannot rely on Duane to save the day everytime. That's why I got ya'll right:D

I'm thinking it's vacuum hose.
 
Where does this vacuum hose go? is it the one from #2 carb to the fuel petcock?
 
Are you sure the plugs didn't foul with the rich condition?

What I did:
Seperated carbs
Dipped all parts in Berrymans
New o-rings installed
Float adjusted
Bench sync'ed
122.5 mains (seems to be rich)
Dynojet needle on third notch from bottom (also rich)
I also blew out all the ports and the pilot jets. I hope junk from the tank didn't get in those carbs!
 
nert said:
Where does this vacuum hose go? is it the one from #2 carb to the fuel petcock?
Click to expand...

yeah, that's the one in question. Like I said it has a slight crack at the top, but it's on beyond the nipple so...

I'm thinking that it is it.
 
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