The dreaded cut-out

[HiWaYman92]

Sled ran great all day, and has only cut out once before for a split second. Toward the end of the day, it cut out bad 3 times, and got me stuck. Even after getting back onto the trail it would cut out if i hammered it once it got to 8-8250 it would cut out and bog down to 5k rpms. It did this several times for the first few miles down the trail on the way out, so I kept on it, and it quit doing it and didn't cut out for the last 6 miles of trail. Did I have a powervalve that got cleaned out on the way out or something?

I've heard plug gap, injector change, voltage regulator... I'll ride it again to see if it's cured or not, but what gives?

9,000 feet, 15-20 degrees, stock sled, just under 800 miles on it.

 

[gopher-it!]

cut out

mine started this at 200 miles. new injectors no difference. new plugs and caps all was good, for a while, 600 miles now sled cutting out again. new stop and tss switch no difference, thought what the hell ill put another set of plugs in, although the spark plugs looked perfect, new plugs and shes back running strong and no cut out, not sure whats going on but something is causing the plugs to misfire.

 

[Grizzly Mtn]

600 miles on mine and it started last weekend just cut out for a short period then would run fine the rest of the day. Yesterday ran strong all day did a couple of wide open throttle pulls ran great, then started it up rode down the trail it cut out then ran fine for a few miles on the trail then died and I could not pull the motor over it was seized up. A couple of minutes later we got it to pull over and start and it would only pull 5800 rpm's for 25 miles back to the trailer. Not sure whats up but heading to the dealer today.

 

[Woodsrider]

HiWaYman99 mined did this also found I was a little light on the clutch weights was hitting rev limiter (8500).

 

[JDPol]

Same issue 450 miles. Random bog, recovered without letting on/off throttle but was real noticeable. Tried different fuel resistor as recommended by dealer. Next ride out sled pulled good early on, but then would not idle. When letting off throttle to come down hill, sled would die as gauges blinked on/off and remained like this until I got back to trailer. Seemed to run fine past half throttle.

Thinking maybe bad Voltage Reg?

 

[RMKen]

Mine had a bog in over the hood powder at wot and I thought it wasn't getting enough air, the check engine would come on sometimes as well. Another pro in the same conditions had no problems so it wasn't air problems. Dealer changed the exhaust temp. sensor as that was the code that came up. Over 400 miles since and no problems.

 

[HiWaYman92]

Mine doesn't seem to set any codes, unless I'm not looking in the right place.

 

[Daniel Boondocker]

rev limiter

I am running 64's in the primary. Everything else in them is stock. We were up as high as 9000 yesterday in deeeeeep snow. The weights seemed a little much at times but the sled still pulls hard even when the r's drop for a split second at times. I noticed the r's drop to 7750 once and 7850 several times on a hard pull. Most of the time they would run 79 ish to 8100 though. They would only drop for a split second it seemed. These efi computers seem to have a lot going on in their brain. Way more momentary fluctuation in rpm's than the older carbed sleds that seemed easier to set the rpm's on more consistently. If they can drop for a split second, can they spike for a split second to 8500 and hit the rev limit? The computer seeems to react very very quickly. Maybe even so quickly that they don't register on the readout. I understand from my dealer that one polaris engineer said these pro's have the most power at 7900 to 8100. I have been considering droping back to 62 to get the r's up to 8200 ish when we go up higher but even though they drop off a bit at times, the sled doesn't seem to bog out like it did on the carbed sleds. It still pulls hard and I keep going over the top. I am not comfortable with the drop to 78 ish range at first, but if it is only for a split second and immediately pulls itself back up to 8100, wouldn't that maybe be ok? Won't know until I try but also the weather (temps and barometric pressure mostly) also change on any given day. Maybe it is ok on average. Some days it still pulls as high as 8250 up high. Not sure if this is your issue but understand from those at my dealer that hitting the rev limiter is a common issue on these.

 

[JDPol]

update, broken primary....at the dealer for repairs

 

[rotax]

update, broken primary....at the dealer for repairs

what broke?

 

[Grizzly Mtn]

Update to previous post. Lost the crank bearing on the PTO side. So not sure of the root cause yet but I was experiencing motor cutting out previous to this so who knows????

 

[HiWaYman92]

I changed to Champion plugs, and wow. Getting worse! Now almost every time I go from a dead stop to wide open it falls directly on its face from 8200-5000. Sends me off the side or just about over the bars. Completely unrideable. Asked my dealer, and he says he hasn't heard of this problem????? Seems MORE than common. The problem is, it seems there is no common fix though. Injectors, TPS sensor, etc. It runs fine other than falling on its face. I'm not happy. I hate to say it, but my 10 M8 never even missed for a second in 1800 miles.

 

[hiwayman]

just a thought. Go back to NGK's and smear some dielectric grease on the plug tip before putting the cap back on. mine has done this twice and never when I wack the throttle,it's been when cruising along at a bout 1/2 throttle and give it a little more,acts like I hit the kill switch and then instantly back on. Then run fine for hours. ?? Like chasing ghosts trying to figure this out. Wish the thing would either run or die !

 

[RMKRAZIE]

Maybe you have a wire rubbed through just like ERR did it was in a bundle in the main harness and if i remember correctly it was the ones for the tps. something to look into.

As for you danielboondocker.. you say it goes from 82-8300 down to 7800 when your making pulls, and the poo guys say it makes its peak power in the 7800-8100 range. Do you think it could be its just its past the peak so it bogs to where its got its power and then is capable of coming back to where you have it set for? just an idea.

 

[HiWaYman92]

H.

just a thought. Go back to NGK's and smear some dielectric grease on the plug tip before putting the cap back on. mine has done this twice and never when I wack the throttle,it's been when cruising along at a bout 1/2 throttle and give it a little more,acts like I hit the kill switch and then instantly back on. Then run fine for hours. ?? Like chasing ghosts trying to figure this out. Wish the thing would either run or die !

That is exactly the same thing. Just like you hit the kill switch, but it wont die, just goes down to about 5 k and sits there until I throttle it down and back. Did grease make yours go away? Mine started out as a once or twice thing.... and now I cant even ride it. They are looking at it this morning. Not optimistic.

 

[HiWaYman92]

Dealer called and said he needs more time with it. I guess it has codes that he hasn't seen before. I guess they tried new injectors, but that didn't change it. He said is something electrical-As I expected. Sweet, say goodbye to spring riding!

 

[TRS]

Have your tried replacing your coil plug wires.
Screw the plug caps off the plug wires, trim the wires and reinstall. We have replaced the plug wires with high quality silicone wires and the problem has gone away. The problem seems to show up around 400 to 500 miles. The wires also screw into the coils.

 

[OnlyPolaris]

Have your tried replacing your coil plug wires.
Screw the plug caps off the plug wires, trim the wires and reinstall. We have replaced the plug wires with high quality silicone wires and the problem has gone away. The problem seems to show up around 400 to 500 miles. The wires also screw into the coils.

have also seen loose wires where the cap screws on and where the wire screws to the coil.

 

[hiwayman]

Mine has only done this once or twice. Heading to Crane lake this Wed. will find out then if it's still a bother. It's something that throws the motor into limp or safe mode for some reason. So, I'm guessing a short in the wiring for the water temp sensor or the pipe temp.sensor. I can't find anything obvius with my wiring yet, but it's gotta be there some place.

 

[load97]

I have had the cutout on my 11' 800 as well. 1-2 per a day if driving all day. Now have hit 1000 miles on it.