Dead Cylinder

S

SRXBOY

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Joined
Sep 21, 2011
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Age
62
Location
Edmonton Alberta
Hi

I posted this question in another section as well.

I have a 98 SRX with about 4000km. I had started it up a few times during the summer and all they cylinders were working. I started it tonight and the right cylinder when sitting on the sled was not working. I noticed this from the prob temperature I thought it was maybe a bad prob but the pipe is cold and the other 2 are hot. I took a look in the cylinder and from what I can see the piston looks ok.

I just had the carbs apart and cleaned them less then 300 km ago so I am hoping it is not this. I took the plug out and started it and could see the plug was firing fine. I couldn't smell any gas so I do not think it is leaking. I popped this plug wire off when it was running and made no effect on the engine sound.

When I cleaned the carbs I also installed Aaen triple pipes and V-Force 3 reeds and the upgrades worked fine.

My next test is to pull the fuel line from that cylinder give it a couple pulls and see if I can see any gas coming out of the line.

Any suggestion would be greatly appreciated.

Thanks
 

Yep check fuel and spark first and go from there. Post back with your findings. If you have good spark then my guess would be a fuel problem. If it ran good for 300 km then I would say your carb cleaning job worked fine as long as it was put back together properly. Have you tried spraying some premix in that cylinder to see if it fires?
 
Actually I still have some premix in my squirt bottle I will give that a try as well. Lots of spark. According to the gauges it did heat up a bit before it stopped working.

Funny thing is that it actually sounds pretty good on 2 cylinders and it idled by itself quicker on 2 cylinder then 3?

Thanks
 
I have spark. I pulled the air box off and pulled the fuel line to the cylinder that was not running and it seemed to be squirting a good amount of gas. So I am thinking something in the carb is blocked. If it is the carb what area would be the best to look in. I had the rpm's high enough to move it and it still was not getting any gas.
 
SRXBOY said:
I have spark. I pulled the air box off and pulled the fuel line to the cylinder that was not running and it seemed to be squirting a good amount of gas. So I am thinking something in the carb is blocked. If it is the carb what area would be the best to look in. I had the rpm's high enough to move it and it still was not getting any gas.
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You mentioned the mileage you put on since the carb clean but not time. Was the 300km this season and if so, within the past 2-3 weeks?

If it sat for more then a few weeks since the last time you ran it, the pilot may have become blocked.

If you squirt pre-mix into that cylinder while it's running does it wake up? If so, I'd check that carb for a clean inlet (top hat) filter above the needle and seat and pilot then compression.
 
all good advice.

heres a idea to lead you directly to the problem. When you remove the airbox to get ready to remove the rack of carbs, take a 17mm wrench and loosen up the nut on bottom of float bowl of suspect cylinder, if it has gas in the carb the problem wont be in the needle and seat but in the pilot jet circuit. If NO gas then likely the screen up above the needle and seat is clogged or the needle is dirty/worn and stuck.
 
Be very careful with what you are doing. The oil/fuel is mixed in fuel pump so if that cyl isn't getting gas, it also isn't getting oil. I toasted a motor bottom end 1 mile after I bought sled because same cyl as yours, the fuel line to carb was pinched.
 

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I broke down and pulled the carbs and I think there was a blockage so I am cleaning all of them again.

I have one more question. When I pull out the pilot jet and run a run a piece of wire through the jet to remove anything that may be in there I cannot push the wire all the way through from either end. I have read that the jet should be clean all the way through. It happens on all 3 jets so I am wondering if what i am feeling helps atomize the fuel before it goes into the cylinder instead of a steady stream of fuel going into the cylinders or I need new jets because i cannot push past what ever is in there.

Thanks for all the advise and comments to my thread.
 
Try a smaller wire. The cleaning kits that one would use for cleaning the tip on a cutting torch has all different diameter wires. That's what I usually use.
 
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