Skidooslayer687
Member
Hey guys, went out on my first big trip this year this weekend. But noticed an issue and I need some ideas as to what it could be.
Basically you start the sled up when its cold, starts after 4 or 5 pulls which it always has... then it will fire up, i flip the choke on and off a few times like i normally do and it will come back down and idle around 2000 or 1800..... then after sitting there for roughly 5 min or so, it will drop its idle down to barely 1000, and sound like its only running on 2 cylinders. Give it some gas and its boggy then all the sudden it sounds like it will kick back onto 3 and run fine, let it idle again and it will still do it. After you take it out though and run it, maybe say 20 min or so it will be alright for the rest of the day. The only time it will do it is when the sled has sat for some time as in overnight.
Now heres what I have checked into:
Fresh fuel with some gas line antifreeze, so its not a fuel problem
I pulled the carbs off, checked them out and there all set correctly, NO dirt
Pulled the plugs when i was out running it when it was "running good" and they were all a golden brown color
Im stumped as to what it can be?? I dont know whether to look into the coils? or stator?
Im going to work on it tonight maybe, start it up and let it run on 2, then pull the plug caps off each cylinder to try and see what cylinder is doing it. and then go from there.
Has anyone had this happen to them before??
Anyways thanks for any help in advance guys
Basically you start the sled up when its cold, starts after 4 or 5 pulls which it always has... then it will fire up, i flip the choke on and off a few times like i normally do and it will come back down and idle around 2000 or 1800..... then after sitting there for roughly 5 min or so, it will drop its idle down to barely 1000, and sound like its only running on 2 cylinders. Give it some gas and its boggy then all the sudden it sounds like it will kick back onto 3 and run fine, let it idle again and it will still do it. After you take it out though and run it, maybe say 20 min or so it will be alright for the rest of the day. The only time it will do it is when the sled has sat for some time as in overnight.
Now heres what I have checked into:
Fresh fuel with some gas line antifreeze, so its not a fuel problem
I pulled the carbs off, checked them out and there all set correctly, NO dirt
Pulled the plugs when i was out running it when it was "running good" and they were all a golden brown color
Im stumped as to what it can be?? I dont know whether to look into the coils? or stator?
Im going to work on it tonight maybe, start it up and let it run on 2, then pull the plug caps off each cylinder to try and see what cylinder is doing it. and then go from there.
Has anyone had this happen to them before??
Anyways thanks for any help in advance guys
Skidooslayer687
Member
Just an update.... Went to work on the machine tonight, wanting it to screw up.... guess what fired up first pull (which it never does, always takes 4 lol) and would not run bad, ran great on the stand, did not take it out on a rip, checked exhaust temps on all 3 cylinders, all were within 5 degrees of each other, checked head temps and all were identical.
I did take the 3 plug caps off, brought them inside, warmed them to 20 degrees Celsius just like the repair manual says and tested there resistance, found it to be a bit high on all 3 for my liking. Supposed to spec out at 5 K ohms and I was getting 5.8-6.1 K ohms on all 3, So I will be replacing those. Also noticed that one of the rubber boots that covers the wire going into the plug boot had a rub through hole on it.
Could moisture get into the caps and cause a misfire??
I did take the 3 plug caps off, brought them inside, warmed them to 20 degrees Celsius just like the repair manual says and tested there resistance, found it to be a bit high on all 3 for my liking. Supposed to spec out at 5 K ohms and I was getting 5.8-6.1 K ohms on all 3, So I will be replacing those. Also noticed that one of the rubber boots that covers the wire going into the plug boot had a rub through hole on it.
Could moisture get into the caps and cause a misfire??
yes it could cause that ....but does it make that went its really cold outside and the sled sleep outside ...my sled did that 4 year long in a row this yes its fix i change carb ..i think one of the needle and seat was bad and was leaking in cylinder slowly during night and flood the cylinder
Skidooslayer687
Member
it doesnt have to be super cold out, like on the weekend it was maybe -17 or so, and it will fire up fine to begin with..... but then after it idles down and sits there for a minute or so it will run on 2 cylinders, not sure which 2, i wanted to find out tonight but it wouldnt do it of course. Im nearly 100% its not in the carbs, pulled them off at the start of the year and they were fine, cleaned them anyways and did it again just the other day to eliminate them from the equation
they will be clean but they can leak during night slowly ..... my sled was like that every first start in morning and fine all days
Skidooslayer687
Member
ttt No one have this issue or any other ideas??
beekmanSRX
Member
im going through the same thing. Its electrical. I believe its in my coil. I wont know until mine comes into the store on friday morning. Im not positive just wanted to respond so you had something to go by. I had the same symptoms. my 3rd cylinder doesnt fire at all now. Checked carbs, checked this, checked that. I took that 3rd cylinder coil and switched bullet connectors with the 2nd cylinder coil. I then switched boots. I put #2 onto #3 n vise versa. started it up and now #2 wasn't firing. Has to be the coil!
something to check anyways if it cuts out permanently
something to check anyways if it cuts out permanently
Skidooslayer687
Member
Alright thanks beekman, definately will look into it, new plug boots supposed to be in today so i'll try that and then go from there, I hope its only a coil, not a stator going lol
Skidooslayer687
Member
Well just an update....
I got my new plug boots, put them on... and fired the sled up. It was about -18 Celsius out and this is exactly the temp that it started acting up on me before. Started in 4 pulls... which is normal, Idled it up, flipped choke a few times... Idled back down, ran fine, did drop a cylinder and run on 2, could not get it to screw up?? Im happy that it ran good, I just really hope that this is what the problem was. I guess time will tell. I did notice that the new plug boots were much tighter fitting then the old ones. I should have measured there resistance but I didnt get around to it. Guess Im just gonna run it like it is, see if it acts up and then go from there.
I got my new plug boots, put them on... and fired the sled up. It was about -18 Celsius out and this is exactly the temp that it started acting up on me before. Started in 4 pulls... which is normal, Idled it up, flipped choke a few times... Idled back down, ran fine, did drop a cylinder and run on 2, could not get it to screw up?? Im happy that it ran good, I just really hope that this is what the problem was. I guess time will tell. I did notice that the new plug boots were much tighter fitting then the old ones. I should have measured there resistance but I didnt get around to it. Guess Im just gonna run it like it is, see if it acts up and then go from there.