please help! sounds like only one cylinder is firing!!!

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Janosik
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please help! sounds like only one cylinder is firing!!!

Postby Janosik » Mon Apr 16, 2012 8:54 pm

hello everyone,
having an awsome time uraling all over south ontario, untill this afternoon she started making a strange noise. i turned it off when i started it back up it was having difficulty idling and whats worse it sounded like only half the cylinders where firing. i checked all the hoses coming from the airbox to carbs, all is ok.
when i had it running i opened up the throttle a bit and noticed some fuel spraying from the right side exaust.
i guess i should have known better than to take the insurance off my winter car :(

any help would be apreciated, i am going to try to swap plugs, maybe open up the carbs?!

thank you comrades
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Re: please help! sounds like only one cylinder is firing!!!

Postby cdscoot » Mon Apr 16, 2012 9:00 pm

Check to make sure your plug wires are on the sparkplug all the way! Sounds like you might have a carb plugged w dirt too - on the right side ! Make sure the throttle cables are seated fully in their ends! Sometimes you might catch a cable and unseat it!n Look also in the splitter - sometimes a cable will get hung up pot of its socket!
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Re: please help! sounds like only one cylinder is firing!!!

Postby Janosik » Mon Apr 16, 2012 9:34 pm

thanks i just checked it all over and am waiting now for the fuel in the carbs to disperse, it was quite flooded.
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Re: please help! sounds like only one cylinder is firing!!!

Postby Niteblues » Mon Apr 16, 2012 10:12 pm

you got a bad plug. just swap them both. set the gap on the new ones. you can get new plugs at any auto parts store. probably.
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Re: please help! sounds like only one cylinder is firing!!!

Postby gobium » Mon Apr 16, 2012 11:00 pm

Spark plugs go bad offen than you think. Spent hrs messing with my type IV IGNITION......bike running rough......put in two new plugs problem solve.

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Re: please help! sounds like only one cylinder is firing!!!

Postby Janosik » Tue Apr 17, 2012 8:05 am

i had a spare set of plugs kickin around and put them in, no good. they are #6's but fuel is still pouring out the exaust at an alarming rate
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Re: please help! sounds like only one cylinder is firing!!!

Postby racepres » Tue Apr 17, 2012 8:58 am

The float on carb [that side] is stuck.
RP

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Re: please help! sounds like only one cylinder is firing!!!

Postby Dwight » Tue Apr 17, 2012 9:17 am

racepres wrote:The float on carb [that side] is stuck.
RP
+1 -- That's what it sounds like to me. Time to use the tire pump to blow out any crud that's holding the float valve open.

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Re: please help! sounds like only one cylinder is firing!!!

Postby Janosik » Tue Apr 17, 2012 5:19 pm

i like the sound of that! how does the procedure work exactly?
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Re: please help! sounds like only one cylinder is firing!!!

Postby ReCycled » Tue Apr 17, 2012 5:24 pm

Janosik wrote:i like the sound of that! how does the procedure work exactly?



OPen the drain screw on the bottom of carb.

Remove fuel line at first connection above carb(filter or T)

insert air pump with supplied little plastic adapter and pump it a few times.

Put back together and ride!
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Re: please help! sounds like only one cylinder is firing!!!

Postby Niteblues » Tue Apr 17, 2012 5:33 pm

i thought you put the little adapter thing on the plastic vent on the carb which would blow the air sort of backwards... :?
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Re: please help! sounds like only one cylinder is firing!!!

Postby racepres » Tue Apr 17, 2012 5:47 pm

Never did it that way... I take them apart. But if I were to use air, I would put it in the inlet line in order to blow past the needle/seat. Certainly remember to open drain, both to let "crud" out, and to relieve pressure. I should think that air into the drain would unseat crud.. but, where would it go?
Note; again, I Never done it.

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Re: please help! sounds like only one cylinder is firing!!!

Postby Janosik » Tue Apr 17, 2012 6:15 pm

BAM! thanks guys that did the trick, let there be drive!
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Re: please help! sounds like only one cylinder is firing!!!

Postby ReCycled » Tue Apr 17, 2012 6:58 pm

Janosik wrote:BAM! thanks guys that did the trick, let there be drive!



Easy fixes are good!
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Re: please help! sounds like only one cylinder is firing!!!

Postby ReCycled » Tue Apr 17, 2012 7:16 pm

niteblues59 wrote:i thought you put the little adapter thing on the plastic vent on the carb which would blow the air sort of backwards... :?



I can see the logic but if the crud is preventing the needle valve from closing, it's already through the orifice and just needs some help getting all the way past the needle. It's also ensuring the float remains open as you're forcing air through, your method might lift the float and force the valve closed.

I also think it's a little less invasive to suggest trying than screwing with that plastic and often fragile vent.

This used to be a common issue. Luckily when it happened to me the first(of two) time was with a group of foilheads at Uralfest '03 :cheers: Cliff H. of the motherboard recognized the issue immediately, showed me the method and we were back on the road in minutes.
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