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Any ideas--fuel streaming from #1 injector?

 
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ljjohns
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Joined: 21 Oct 2006
Posts: 263
Location: El Paso

PostPosted: Tue Apr 26, 2011 5:35 pm    Post subject: Any ideas--fuel streaming from #1 injector? Reply with quote

Started reassembling the '95 Saturday, having done all sorts of stuff including cleaning throttle bodies, having the injectors done by Mr Injector, replacing the rubber mounts below the TBs, etc.

Fired it up, tuned it with a Carbtune and did a couple of miles with the bike naked around the neighborhood with some big smiles all around at the end. But then, when moving it back into the garage, first noticed a gas smell and then, when in the garage, a small but intense stream of fuel from the #1 injector area (cylinder at the front of the bike).

Had to stop--other things to do that were much less fun--but my first suspicion is that the #1 injector didn't get seated properly/secure. That'd be the simple solution; what else might I be looking for?

Thanks

Larry Johnson
El Paso TX
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SugarHillCTD
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Joined: 10 Oct 2007
Posts: 4238
Location: Now in Eastern Pennsylvania

PostPosted: Tue Apr 26, 2011 6:00 pm    Post subject: Reply with quote

Larry,

Based on the few times I removed and replaced the injectors, I think you are correct. On the 2 different K1100's I have worked on, the O-rings can get pinched as you insert them into the manifold.

Did you use new o-rings? I once put a very slight tear in an o-ring (after I tried to reinstall the injector with a used o-ring) and gas did find its way out.

Did you smear a little grease around them to help get the o-ring seated correctly?

Good luck,
John
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ljjohns
Flying Brick Rider


Joined: 21 Oct 2006
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Location: El Paso

PostPosted: Tue Apr 26, 2011 6:08 pm    Post subject: Reply with quote

Thanks, John

The o-rings were new ones supplied by Mr Injector and we did lube them.
Since that's a two-bolt removal check, we'll eyeball them carefully when we get our end-of-the-semester grading done.

Larry Johnson
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1995 K1100LTSE
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2003 K1200LTC
1991 K75RT
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SugarHillCTD
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PostPosted: Tue Apr 26, 2011 7:26 pm    Post subject: Reply with quote

IIRC,

Most times when I installed each injector I felt it go to a solid "bottom". But on one or two it didn't feel as solid- no leaks, but I was unsure about how well it was seated.
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Scott_Anderson
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Joined: 05 Sep 2006
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PostPosted: Wed Apr 27, 2011 12:46 am    Post subject: Reply with quote

I had one not seat on the rail side once, but generally if you can't seat them in both ends you shouldn't be able to bolt down the rail supports. At least I wouldn't think you could.
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Stoked Steve
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Joined: 01 Sep 2004
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PostPosted: Wed Apr 27, 2011 7:36 am    Post subject: Reply with quote

Quote:
Based on the few times I removed and replaced the injectors, I think you are correct. On the 2 different K1100's I have worked on, the O-rings can get pinched as you insert them into the manifold.


Ditto on that, I had one of the rubber o-rings pinch up a bit when putting it back in and there was gas dribbling all over the place. A simple reseating cured it.
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merlin geikie
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Joined: 26 Dec 2008
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PostPosted: Thu Apr 28, 2011 12:20 am    Post subject: Reply with quote

SKD writes;
Quote:
Ditto on that, I had one of the rubber o-rings pinch up a bit when putting it back in and there was gas dribbling all over the place. A simple reseating cured it.


Sounds right to me.

Maybe a magnifying glass to closely inspect O ring surface for dings.

Look down to the seating surfaces in the head for any crud perhaps.

Let us know how you go

all the very best Wink
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