Engine cutting out problem resolved

[KnappAttack]

Mine has red elbow on 18.

I have never had pressure when cap removed....

So are all red ones bad i wonder?

Dan,
In the pic posted above, the red elbow is the fuel return from the fuel regulator and not the vent valve.

The tank vent valve is the black one above he is pointing too in the pic, and is the one responsible for allowing air into the tank and also hold some pressure on the tank so vapors just do not escape as per new EPA regulations.

A pound or two of tank pressure is not responsible for an engine cutting out while running, but if its not allowing air in, then of course the engine is going to run lean and starve on fuel.

 

[ROCKERDAN]

Ok Mike so this helps me confirm things.

I know when I removed my tank the other day, the left one(RED in my pic) is an elbow, that come from engine, so I assume a return line, it has a CLAMP on it that cannot be removed, and so I pulled the red elbow out of grommit to remove tank from sled.

THE BLACK thing next to it, which I would not really describe as an ELBOW but i supposed some might, Is connected to the clear blue-ish VENT tube, very soft typical vent tube with a cheap tension clamp on it which I simply slid down with pliers.

TO BE CLEAR EVERYONE.....Mike is saying this black VENT tube part is the culprit. Not the red elbow on left side. And so I MUST assume the 17s were RED then? Anyone got a pic of a 17 vent tube part in RED?

This is why we all need to be MUCH MORE SPecific when we type gang....Everything I read so far pointed to the RED elbow on left. Bu that is wrong.

Thanks Mike, as always you know this stuff brother.

Dan

 

[ROCKERDAN]

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[ROCKERDAN]

I may have edit all this stuff Mike....

Please see other thread, seems like the red elbow is the updated part from sounds of it....grrr
https://ty4stroke.com/threads/red-elbow-updated-part.151146/

Let me know so I can remove all this stuff if its incorrect.

Dan

 

[KnappAttack]

Dan,
I'm reading what some are saying about the red elbow being too small and the new one being ported larger, or having a large hole in it.

If the elbow would restrict fuel and was too small, it would show up at an idle when fuel volume & pressure come from regulator and gets backed up by the elbow with it being the smallest restriction in the line instead of the regulator, as this is when all the fuel not being used and returned back to the tank. Once underway the engine is going to be using more fuel and returning less to the tank.

This elbow will also not be the reason for the engine cutting out while running. If it was the actual restriction in the return rather than the fuel regulator, it would cause the machine to run rich and smoke black with higher than required fuel line pressure.

Keep in mind, the only thing that would cause the machine to "cutout" while running would be a plugged or kinked vent line or plugged vent valve at the top of the tank.

Too much misinformation and hysteria here, as the red elbow can't create a cutout situation. It is however possible a tank not getting air to replace the fuel being used would cause the engine to starve on fuel and possibly "cutout". It will not cutout from a ignition standpoint, but from a lean standpoint and possible popping in the intake as in running out of fuel.

 

[KnappAttack]

People are making way too much about the tank pressure too. The valve is designed to hold pressure on the tank when the vapor expands.

QUIT WORRYING ABOUT THE PRESSURE IN THE TANK PEOPLE!

It is designed to hold pressure by using the vent valve! So what it tries to blow off the cap.

Now if you have vacuum on the tank you have a problem. Worry only about that, and that only. That is where your surging is going to be coming from is a kinked vent hose or plugged vent valve, not letting AIR INTO THE TANK!

 

[XP123]

I may have edit all this stuff Mike....

Please see other thread, seems like the red elbow is the updated part from sounds of it....grrr
https://ty4stroke.com/threads/red-elbow-updated-part.151146/

Let me know so I can remove all this stuff if its incorrect.

Dan

The only part that has been updated Dan

I may have edit all this stuff Mike....

Please see other thread, seems like the red elbow is the updated part from sounds of it....grrr
https://ty4stroke.com/threads/red-elbow-updated-part.151146/

Let me know so I can remove all this stuff if its incorrect.

Dan

Dan it looks like the only part that was updated is the red elbow not the black check valve. I ordered one just because they are cheap. I also ordered a new clip for it because you can't reuse the one that's on it. I wonder if you need a special tool to install the clip or maybe I should just get one you can tighten with a screwdriver/ 1/4 inch socket?

 

[geez150]

You can either use a pex crimper or I was able to use a pair of side cutters as it had enough angle to force the clamp together, maybe you can use pliers or something but I found I needed something that started with enough force to close the clamp tight.

 

[XP123]

You can either use a pex crimper or I was able to use a pair of side cutters as it had enough angle to force the clamp together, maybe you can use pliers or something but I found I needed something that started with enough force to close the clamp tight.

I have a pex crimper so I'll probably use that.

 

[ROCKERDAN]

Looks like a pex style crimper Joe...

So the red one gets updated eh? Even on my 18?

Im trying to suit up here as we are heading out to parry sound for ride now, I will get back in here tonight to fix all this.

I just want us all to get the info right.

Thanks Mike and everyone.
Dan

 

[Tarzan]

What is the air intake temp when the engine is cutting? Ice in front of intercooler can cause high intake temp and engine will reduse hp and maybe cut the engine?

 

[Tarzan]

Maybe the engine is getting to much..cold air and going lean?

 

[Beech]

Sounds like with the cold weather the fuel line is freezing up.
Try adding some isopropyl alcohol to your tank of fuel

 

[snowbeast]

Dan,
In the pic posted above, the red elbow is the fuel return from the fuel regulator and not the vent valve.

The tank vent valve is the black one above he is pointing too in the pic, and is the one responsible for allowing air into the tank and also hold some pressure on the tank so vapors just do not escape as per new EPA regulations.

A pound or two of tank pressure is not responsible for an engine cutting out while running, but if its not allowing air in, then of course the engine is going to run lean and starve on fuel.

Mike,what would you recommend about that black tank vent valve,we did drill out the red elbow,and have not rerun it yet,but maybe tomorrow we can give it a shot,but the air temp tomorrow will not be cold,it will be plus 21 not minus 21 like what we have been getting,so it may run good anyways,but I would really like to figure out this problem be fore I start racking up the miles,and mine may be more prone to this,as it is tuned up,not stock.

 

[KnappAttack]

Mike,what would you recommend about that black tank vent valve,we did drill out the red elbow,and have not rerun it yet,but maybe tomorrow we can give it a shot,but the air temp tomorrow will not be cold,it will be plus 21 not minus 21 like what we have been getting,so it may run good anyways,but I would really like to figure out this problem be fore I start racking up the miles,and mine may be more prone to this,as it is tuned up,not stock.

If the vent valve can have vacuum pulled thru it, along with pressure too, its fine, do nothing Pete.

The problem is people do not understand that pressure that builds in the tank is by design to prevent vapor loss. Everyone freaks out that the cap blows off or it holds pressure, and old sleds never did this before.

The return elbow is not the reason for cutting out either like I said. If the orifice is too small in the elbow, all that would do is create a rich condition at idle and down low when the most fuel is getting returned to the tank as it is more restriction than the fuel regulator is all. It would create a high line fuel pressure and run rich, not cut out.