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PhredValk
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« on: September 13, 2015, 11:40:14 AM » |
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Hey, Gang. I got a little silly yesterday and dragged a mustang down an on-ramp to the freeway. I won, but got the crap scared out of me as the throttle got stuck wide open! I got on the kill switch and parked on the shoulder to inspect and fiddle. No joy.
After waving bye-bye to the AMA driver from my garage I set the girl up on jack stands and removed the tank. Rather than pulling the airbox I made myself a stiff drink and started searching this page for suggestions.
I found a thread by JimEd from Sep '09 with some great suggestions and JimEd's solution (slipped cable), but it doesn't help me. After removing the linkage covers I find that the cables work fine, the linkages on both sides turn properly when rotating the grip in both directions, and neither the throttle lock nor the Audiovox CC interfere in any way (the Audiovox is physically installed but I haven't gotten to the electronics yet; so it's there but not yet working).
I guess I'll have to open up the carbs to see what's stuck. Can I just remove the chrome covers one at a time and inspect, or is it going to be way more complicated? I just don't want to do anything that ends up to be useless, like removing the airbox (again! did desmog last spring and Danmark valve this spring...) if I don't really have to.
TIA, Fred.
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Logged
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Growing old is mandatory, growing up is optional.
VRCCDS0237
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Bighead
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« Reply #1 on: September 13, 2015, 01:01:35 PM » |
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Have you started it up since? Seems to me if the slides are working it is not still stuck.
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Logged
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1997 Bumble Bee
1999 Interstate (sold)
2016 Wing
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PhredValk
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« Reply #2 on: September 13, 2015, 01:22:55 PM » |
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Started after all of the above, went strait to rev limiter.
Fred.
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Growing old is mandatory, growing up is optional.
VRCCDS0237
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3W-lonerider
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« Reply #3 on: September 13, 2015, 01:49:22 PM » |
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i'm thinking probably a couple of stuck needles and diaphrams in the carbs. removing the diaphrams and needles and spraying some carb cleaner in there might clean the gunk out and get them freed up to slide up and down like they were meant to
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BonS
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« Reply #4 on: September 13, 2015, 02:04:52 PM » |
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There's a linkage arm that connects the right side of the carb six-pack to the left side. This is the same arm that the CC ties to. If that linkage is disconnected then the right side carbs, and cables, will work fine but the left side is just sitting wide open. You likely allowed this to happen when you installed the aircraft cable of the CC to the linkage. The retainer for this arm was removed to allow the cable loop to be captured.
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PhredValk
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« Reply #5 on: September 13, 2015, 02:29:09 PM » |
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BonS; the linkage is fine, both side linkages turn with the grip.
3W; can this be done without removing the carbs? I can do that but it looks to be a lot of work...
Fred.
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Growing old is mandatory, growing up is optional.
VRCCDS0237
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BonS
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« Reply #6 on: September 13, 2015, 02:46:17 PM » |
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If the butterflies are closed then stuck diaphragms and slides won't cause runaway because the engine can't get enough air.
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BonS
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« Reply #7 on: September 13, 2015, 04:08:13 PM » |
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You can pull off the intake manifolds and look into the throats of each carb to see the butterflies working. From there you can also use your finger to see if the slides move up and down freely. The manifolds go off and on very quickly and easily and you can remove two on each side at one time without issue.
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PhredValk
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« Reply #8 on: September 13, 2015, 04:20:05 PM » |
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Thanks, I'll try that after dinner.
Fred.
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Logged
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Growing old is mandatory, growing up is optional.
VRCCDS0237
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PhredValk
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« Reply #9 on: September 13, 2015, 07:14:23 PM » |
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OK, so I removed the intake manifolds and all 6 butterflies move exactly the same when the grip is twisted. Twist back and they all open fully, twist closed and they all close to leave about 1/4" space. Should they close completely or is this normal operation?
BonS; I;'m not sure what you mean by 'sliders'.
Fred.
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Logged
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Growing old is mandatory, growing up is optional.
VRCCDS0237
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Firefighter
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« Reply #10 on: September 13, 2015, 07:53:28 PM » |
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Never looked at mine but my experience is they should close all the way. Could have something stuck in one holding them all open or some linkage trouble. Should be able to see if the throttle cable is tight holding them open or not. Let us know.
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Logged
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2000 Valkyrie Interstate, Black/Red
2006 Honda Sabre 1100
2013 Honda Spirit 750
2002 Honda Rebel 250
1978 Honda 750
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BonS
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« Reply #11 on: September 14, 2015, 04:38:22 AM » |
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The butterflies should close until they appear to touch all the way around leaving no gap.
To see the "sliders" you need to open the throttle butterfly fully and just behind the butterfly is the black plastic slider. These move up and down with engine vacuum, pulling the taper needle out of the main jet as they do so.
I wouldn't worry about the sliders though. Something is holding your butterfly's open and that's where your investigation time should be spent. Firefighter is right, anything holding just one butterfly open will affect them all. Your push/pull cables could be frayed or out of position as well.
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Patrick
Member
Posts: 15433
VRCC 4474
Largo Florida
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« Reply #12 on: September 17, 2015, 01:17:06 PM » |
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Still wondering what the problem was.
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da prez
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« Reply #13 on: September 18, 2015, 02:41:59 AM » |
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Dis-connect the throttle cables and start up. If you have checked for all the obvious linkage binding then start over and do not skip any thing. You should be able to determine if it is internal or external. Let us know , even if you feel it is a stupid mistake . No one will pick on you. This is a family friendly board and maybe some one else may have this problem and you will be the hero.
da prez
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ammpro
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« Reply #14 on: September 18, 2015, 10:18:09 AM » |
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The first thing I would suspect would be a temporary hangup with the CC linkage...
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Frank
Have fun. Be safe. Always set a good example.
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PhredValk
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« Reply #15 on: September 19, 2015, 06:16:16 PM » |
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Been working all week, and it's been cold and rainy. I'll re-instal; the intakes and pull the cables tomorrow to see what happens.
Fred.
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Logged
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Growing old is mandatory, growing up is optional.
VRCCDS0237
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