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greggtheegg
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« on: April 05, 2009, 06:50:41 PM » |
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Lately one of my spark plug tends to foul a lot. Also, I noticed gas dripping out of the exhaust pipe coming from that cylinder. My carbs are jetted so adjusting the rich/lean screw does nothing. This Valk is a 97 with 34000 miles. Has anyone else had this problem or know what needs to be replaced/adjusted to fix this problem? Thanks!
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RP#62
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« Reply #1 on: April 05, 2009, 07:10:51 PM » |
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If its #6, its your petcock telling you it needs attention.
-RP
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R J
Member
Posts: 13380
DS-0009 ...... # 173
Des Moines, IA
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« Reply #2 on: April 05, 2009, 07:38:01 PM » |
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If its #6, its your petcock telling you it needs attention.
-RP
AND until ya fix it, turn the gas valve off when parked.. |
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44 Harley ServiCar   |
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bigvalkriefan
Member
Posts: 407
On the green monster
South Florida
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« Reply #3 on: April 06, 2009, 05:35:53 AM » |
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Possible failed petcock, bad vacuum line, but seems to definitely have a stuck float. Fix it asap or suffer the dreaded HYDROLOCK
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.....say to those with fearful hearts, "Be strong, do not fear; your God will come, he will come with vengeance; with divine retribution he will come to save you."
Isaiah 35:4
I know who wins in the end.
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Mr.BubblesVRCCDS0008
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« Reply #4 on: April 10, 2009, 08:09:55 AM » |
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If it is number 6 the petcock maybe letting gas into that cylinder threw the vaccum line that normally open the valve when the engine starts. It will get into the cylinder below the carb at the vaccum port.
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Shotgun
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« Reply #5 on: April 11, 2009, 08:02:39 AM » |
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Fix it now! Turning off the petcock WILL NOT prevent hydrolock. I would be VERY careful when starting it. Just tap the starter and see if it turns. Otherwise your going to end up with something that looks like this.  |
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Shotgun
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« Reply #6 on: April 11, 2009, 08:04:24 AM » |
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Or this!  |
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R J
Member
Posts: 13380
DS-0009 ...... # 173
Des Moines, IA
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« Reply #7 on: April 11, 2009, 08:12:11 AM » |
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To be real safe on the hydrolock, pull the plugs, and hit the starter.. If there is raw gas in there it will come flying out, then you can put the plugs back in and fire it up to get it somewhere to get it fixed....
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44 Harley ServiCar |
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mikeb
Member
Posts: 311
vrcc-29271
dansville mi by lansing mi
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« Reply #8 on: April 12, 2009, 04:34:19 PM » |
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i sure hope he reads these post .. my gold wing did this it sucked  |
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i dont care what you ride just ride mike & kari mivrcc capital city leader s.s.d.d.  |
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greggtheegg
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« Reply #9 on: April 15, 2009, 08:52:43 PM » |
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I want to fix it myself if possible. How do I check/fix the petcock? How do I fix the carburetor?
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iamsofaking
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« Reply #10 on: January 31, 2011, 01:02:51 PM » |
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No more replies on this. I haven't started fouling plugs, but noticed some schmootz spitting out of one of the pipes this am. I have removed my petcock before, is that all that's needed, a petcock replacement?
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Hook#3287
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« Reply #11 on: January 31, 2011, 02:48:16 PM » |
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IF it's number 6 then you could have a petcock issue or you could have a stuck float. The back of #6 carb has a vacuum hose the connects to the petcock. The petcock has a diaphragm in it that is pulled by the vacuum of the #6 carb and allows gas to flo to the carbs. If the diaphragm is damaged or stuck gas can flow into the carb. I believe the float of the carb would also have to be stuck so that gas will flo into the firing chamber, filling it and causing the hydrolock. VERY BAD! Is the leak gas? With the bike not running and petcock on, open the drain screw on number six carb a small amount of gas should leak out from the overflow hose over by the rear brake pedal. If it doesn’t stop, then you must have a float and /or diaphragm issue. Thankfully, I've never had to deal with either problem, but I've rebuilt my petcock and I believe you have to pull the tank off, at least I did. Maybe you can do it with out taking the tank off, but I didn't. A float issue, I believe, requires pulling the carbs to do it right. Straighten me out if I'm wrong here
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Ricky-D
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« Reply #12 on: January 31, 2011, 04:17:10 PM » |
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No more replies on this. I haven't started fouling plugs, but noticed some schmootz spitting out of one of the pipes this am. I have removed my petcock before, is that all that's needed, a petcock replacement?
Here ya go! http://www.valkyrieforum.com/bbs/index.php/topic,22674.0.htmlRoger had the same problem so read the thread. *** |
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2000_Valkyrie_Interstate
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Blackduck
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« Reply #13 on: January 31, 2011, 05:05:26 PM » |
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A couple of points.
You can have a petcock that looks like there is nothing wrong with it but it passes fuel.
There is a very small bleed orifice that allows air in to shut off the valve when you turn the engine off, have had this block up and it holds vacuum on the valve allowing fuel to flow. Not a real problem if the manual valve is off and seated correctly.
Anyone removing and replacing a petcock needs to make sure there is NO side load from the selector knob when refitting, it holds the valve off it's seat allowing fuel to pass.
Additionaly there is a drain port on the petcock cover that should be pointed down, this prevents fuel flowing into the intake if the diaphragm leaks.
Before hooking up the fuel line apply vacuum to the petcock with the manual valve in the off position and wiggle the selector knob to check there is no side load and no fuel passing.
For fuel to get into the carbs there also has to be a sticky float.
Had this happen after a carby cleanout, blew all passages out with air, cleaned the bowls and tank filter. Ran it for a short while then left it for a day, sitting upright on the lift. Went to start it and had a cylinder full of fuel. Found the manual valve not seating right and on the second inspection of the petcock found the blocked orifice. Not sure of what happened with the float but have had no further problems.
Cheers Steve
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2001 Standard, 78 Goldwing, VRCC 21411
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rogerthat
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« Reply #14 on: January 31, 2011, 05:39:43 PM » |
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"Which plug?" is the question of the day here. If it's #6, pull the vac hose off the intake runner and make sure no gas is in it. It should be dry. If so: Change the petcock. the hose from the petcock connect post-carb, so the float doesn't matter. If it's NOT 6, watch out for hydrolock, it might be a leaking float valve. Been there, done that....
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iamsofaking
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« Reply #15 on: February 01, 2011, 06:46:03 AM » |
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Thanks doods. I'll investigate further and report back.
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Ricky-D
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« Reply #16 on: February 01, 2011, 07:54:59 AM » |
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***
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2000_Valkyrie_Interstate
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