kinda let down today
- Thread starter SNOMAN1174
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edavis0202
Well-known member
Most grass drag sleds are built engines with fuel controlers and different mapping. I gues you got a point, but its been a common flaw this year for Polaris
58's? Really? I was in WA last week on two decent '11s and they lost 3-400rpms
In tanning temps. RPMs came back the next day when it was cooler.
If the engine load is too light, dumb things can happen. YMMV.
Yes 58s. We unload @ almost 11k. Probably some of the highest riding in the US other than ak....lighter sound.
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Just to be clear, we AK riders rarely get above 6,000 feet. Yes, the mountains are big and impressive....but they be at sea level, mang.
Turnagain Pass, the bowls above the Placer River, Lost Lake....all beyond fantastic mountain riding destinations are for the most part below 4,000 ft.
You boys in the Rockies ride much higher elevations then we do.
Sure, Mt McKinley is 20,000+ but you can't ride there (legally).
yes something is up with these my dealer thinks a fuel pump issue and Polaris is out of stock with fuels pumps. I've spent the last 2 months dealing with this problem. At first I thought maybe TPS then I thought throttle cable but for some reason the dealer thinks fuel pump. I think my dealer has a few with the same issue. This many turn into the first and last Polaris for me. It's to short of season to go this long with a sled that doesn't run correctly. I'm sick of planting my chest on the handle bars.
The air density curve is calculated based on intake temp probe and barometric pressure. I would guess either poo has a map issue at the higher temps, or the system wasn't designed to operate at those air temps. Don't know. The air density curve approach is the same used by doo with DPM, different application with float bowl pressure, of course. Doo's DPM would enlean until 70F, regardless of pressue, then hit it's enleanment limit. FWIW.
Do you have a set of 56 gram weights? That's what I ran in mine there before my BoonDocker turbo. With the track you had on and how heavy the snow was, I'm surprised you were able to get over 7600 rpm.
Matt, i hope you checked this guys primary spring... bog off bottom screams on top, sounds exactly like a broken primary spring...
(how many of those were replaced this year?? exactly...)
We sold about 25 to the local folks around here.
I was only around that group for a short while, so I didn't see or hear how it was running a whole lot. Spring is definitely a possibility. Riding same general area is why I mentioned the weights. Personally, I changed 4 primary springs......... before I went to a different clutch, but that's another topic.
Primary spring makes a lot of sense. Just curious, did you dump some race fuel or try again with fresh fuel? I have had bad gas...in my sled before. With the ethanol fuel we get it binds up water and it's possible to get doses of water pulled in.
Did you see any bogging issues?? If so what's going on? My dealer seems to have few at this point and he seems to think fuel pump. I think more is known here after going to snowmobile show and asking a bunch of questions, but everyone seems very vague. I think they know the problem but Polaris has no parts. I want a solution before the factory warranty runs out and I'm dealing with a secondary company.
Pretty sure its not the primary. Took about 45 minutes but then it came back. Temp issue is where I'm leaning. Sled is going to dealer tomorrow.
I say its not primary spring because its like someone hit the kill switch for 1.5 seconds. Then it comes alive.
The first sign of a broken primary spring is super smooth low rpm engagement. I've had a couple that would engage at 2000 rpm and they feel sluggish until the midrange, then run ok.
Def not primary. Engaged at 38 I think. I'll let you know what dealer says. I'm liking the temp issue as the culprit. I broke 3 primary springs on my td8 so I feel like I know that feeling. It looked good when I checked it out. Someone mentioned maybe the ecu can't compensate the fuel curve above 50 or so degrees. This would make sense as.today was.pretty warm. No engine lights. Just like someone kill switched it for a.second.
Our bogging was the pump..you could hear it whining when it ran bad.
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FCR112
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Well whattayaknow...Mine did the same today. 11-12,500' And the TPS is full of dielectric grease along with every other connector.
It ran great for the first 1/2 of the day. Outside Temp about 55 degrees...
Then after shutting it down for 20 minutes, (during which the temp dropped by maybe 20-25 degrees after the sun went behind the ridge for good) restarted and low and behold just like the kill switch was bumped for a second at 5-6grand when I grabbed a handfull of throttle. It would get through it if I let off and got back on it.
Not a broken spring, it feels just like an ignition cut out for maybe a second.
The only time I have felt this before was running too little weight on a few pulls while trying to dial in the clutching early season.
My guess is an ecu parameter being exceeded momentarily. The snow was summer conditions and the track (which completely sucks on spring/summer hardpack) was spinning as it got crispy again when the temp dropped... Possibly just an over-rev?
Yeah I know the playback, you are right and no I didn't... I wasn't too worried about it as the sled ran fine all the way up the rpms if I just let off and tried again.
It ran great for the first 1/2 of the day. Outside Temp about 55 degrees...
Then after shutting it down for 20 minutes, (during which the temp dropped by maybe 20-25 degrees after the sun went behind the ridge for good) restarted and low and behold just like the kill switch was bumped for a second at 5-6grand when I grabbed a handfull of throttle. It would get through it if I let off and got back on it.
Not a broken spring, it feels just like an ignition cut out for maybe a second.
The only time I have felt this before was running too little weight on a few pulls while trying to dial in the clutching early season.
My guess is an ecu parameter being exceeded momentarily. The snow was summer conditions and the track (which completely sucks on spring/summer hardpack) was spinning as it got crispy again when the temp dropped... Possibly just an over-rev?
Yeah I know the playback, you are right and no I didn't... I wasn't too worried about it as the sled ran fine all the way up the rpms if I just let off and tried again.
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