Bog at initial throttle input

[JRoar]

My 2012 has the tendency to throw me off the sled at least once a trip. Once i start the sled and punch the throttle the sled moves forward briefly then completely stops but does not shut off. It's not happening every time but it seems to happen later into the day. From what i have read so far it seems it could be the TSS or an over oil problem. Before reading about this i started with the basics the sled has 2300 miles so i put new plugs in and the boot/gasket between the hood and intake since it was a little loose. Any ideas on where to go from here would be appreciated. Going over the bars because of the sled is just embarrassing. Thanks!

 

[Old & slow]

My 2012 has the tendency to throw me off the sled at least once a trip. Once i start the sled and punch the throttle the sled moves forward briefly then completely stops but does not shut off. It's not happening every time but it seems to happen later into the day. From what i have read so far it seems it could be the TSS or an over oil problem. Before reading about this i started with the basics the sled has 2300 miles so i put new plugs in and the boot/gasket between the hood and intake since it was a little loose. Any ideas on where to go from here would be appreciated. Going over the bars because of the sled is just embarrassing. Thanks!

If your throttle cable is a little to loose it will cause this. I find that if your pushing nice and straight no problem but when you stand and push the throttle on a bit of an angle over the bars you go. I run my cable a little tighter than spec and don't have any issues. Lots of guys disconnect the TSS and replace it with a tether. I don't recommend removing or disabling any safety device.

 

[9071000]

my 12 did the sameting.Had to delete the tss and went with a tether

 

[richardderkevorkian]

My 2012 has the tendency to throw me off the sled at least once a trip. Once i start the sled and punch the throttle the sled moves forward briefly then completely stops but does not shut off. It's not happening every time but it seems to happen later into the day. From what i have read so far it seems it could be the TSS or an over oil problem. Before reading about this i started with the basics the sled has 2300 miles so i put new plugs in and the boot/gasket between the hood and intake since it was a little loose. Any ideas on where to go from here would be appreciated. Going over the bars because of the sled is just embarrassing. Thanks!

Sounds like it's heat sinking the air in the airbox if it's happening right after you take off each time with a hot sled. Let it idle for a minute before you pin it. Sled sits there after you shut it off and the airbox soaks up all the pipe heat, start it and take off instantly the intake air temp sensor thinks it's 100° outside and cuts all the fuel.

Side note, the tss is a pain i disconnected mine and went with a tether.

 

[JRoar]

Good info Guys. I have a tether installed inline with the key. Is there a way to disable the tss without causing an issue in this configuration? Also i will check cable tension. But i do agree that it seems to be fuel delivery based on the fact that the sled is not shutting off completely only putting me over the bars while it idles away laughing. Good test for my tether though, found out the lanyard is pretty long LOL

 

[sledhead685]

What happens if you hold it full throttle when it does that? Does it make it even worse?

The first thing I would do is disconnect the TSS in the throttle block. Had do that to a previous sled on the mountain once and it was a pain, so I just do it preventively now in the shop because it's much easier there. Doesn't change anything with how it runs once it's unplugged. If you open up that block there are a few little plugs in there behind a small plastic holder. The one for the TSS should be obvious, the others are for the warmers.

Also, as a side note, if your warmers don't work like many check the pins in their plugs while you're in there. They get loose and make the warmers stop working. I've gotten them to work again by messing with those pins.

 

[JRoar]

The Bog seems to be the same if hitting it hard to get the back-end set in or when i ease into it. Another reason i'm not convinced its the TSS. I would think if it was a switch of some kind i would get various results. The next time it dose it "if i'm still on the sled" ill try to hold it wide open and see what happens.

 

[kiliki]

just open the throttle block and disconnect the tss its has a plug.

 

[Old & slow]

Good info Guys. I have a tether installed inline with the key. Is there a way to disable the tss without causing an issue in this configuration? Also i will check cable tension. But i do agree that it seems to be fuel delivery based on the fact that the sled is not shutting off completely only putting me over the bars while it idles away laughing. Good test for my tether though, found out the lanyard is pretty long LOL

Another thing to check is idle speed make sure it not to slow.

 

[Coldfinger]

Is the TSS also supposed to cut the engine if the sled rolls upside down and the throttle is stuck wide open?

 

[kidwoo]

In theory. Doesn't really work IMO. You'd have to have the pressure right at the pivot for it to activate the safety feature.

That's part of the reason I went to a finger throttle and tether......my sled rolling after me and surging when the handlebars hit the snow.

 

[JRoar]

So the engine has not cut off yet only dropping RPM. Is there something i can do for the air temp sensor?

 

[kidwoo]

just unplug the tss.

What it does sounds exactly like what you're experiencing. It's a crappy plastic pivot that wears out. Usually right about the number of miles you have on your sled.

 

[Old & slow]

Is the TSS also supposed to cut the engine if the sled rolls upside down and the throttle is stuck wide open?

The TSS is not for a roll over or upside down sled. It is for a frozen, binding or stuck throttle cable. Your sled will run fine upside down at full throttle.