2004 M-7 153 mid-range flutter/burble Help!

Damon8 · Dec 6, 2010

Hi,

Posting for a friend- He has a stock 2004 M-7 153, running at sea level in Minnesota. He just purchased the sled and is having an issue in the mid-range. When taking off, the sled runs fine, but when you get into the mid-range it starts to flutter a bit and run crummy, but then it runs good at wide open throttle. Anyone have any suggestions or ideas? We were thinking possible reed problem, however, not sure as we mainly deal with Polaris. Thinking some of you cat guys may have more insight/know-how.

Thanks, appreciate it.

XFIRE800 · Dec 6, 2010

Maybe the problem is theres no such thing as an 04 M7? Try changing the plugs for starters.

Damon8 · Dec 6, 2010

He changed plugs, and yeah, it's an 05. I was off by a year. Huge mistake, my bad. Anyone else have any ideas or suggestions?

hllrazor · Dec 6, 2010

sled

clean power valves and adjust them

tatorsalad · Dec 6, 2010

The m are way hot in the mid range unplug the ethenol plug it is the gray wire by the ecu that is just looped around it will up the fuel a bit also check the tail light for rubbed wires they can be a problem i wiould get so dielectic grease and put it in all the plugs Good luck

XFIRE800 · Dec 6, 2010

Damon8 said:
He changed plugs, and yeah, it's an 05. I was off by a year. Huge mistake, my bad. Anyone else have any ideas or suggestions?

Haha just a joke sorry.

undercat · Dec 6, 2010

valves

get the power valves set.my friends did the same thing and thats all it was.

golfsnownut · Dec 6, 2010

Mine does exactly last few years and I have checked power valves but they are clean! And measurements are right on so still does that.... I just gave up and keep riding ever since, still not knowing whats wrong with that... I suspected that it has to do with ECM mapping.....

Damon8 · Dec 6, 2010

Thanks Alot guys, he's going to clean the valves tonight and see what happens. I will give you an update once we get it figured out.

mulestar · Dec 6, 2010

Let us know if you could, my little bro's M7 was doing that same thing yesterday. I was trying to talk him into cleaning the p valves yesterday but he is too stubborn. Says its in his clutching...I know that it is not. Sounds like the same thing, he has never cleaned his.

Thanks!

fast eddie · Dec 6, 2010

mid range stutter

I also have 05 m7, when I bought it stock last year in MN as well had the stutter, went out west 6-9000' ran like a champ came back home and stutter was back, I added some mods this year and it just made it worse, I think its in the mapping but if a person remaped it would it screw you up for higher elevations, let me know what u find out

powdercrav · Dec 6, 2010

fast eddie said:
I also have 05 m7, when I bought it stock last year in MN as well had the stutter, went out west 6-9000' ran like a champ came back home and stutter was back, I added some mods this year and it just made it worse, I think its in the mapping but if a person remaped it would it screw you up for higher elevations, let me know what u find out

have the same thing on my 05 M7...runs clean higher up but at home it stutters. gonna check and clean the powervalves like everyone here suggested...then maybe fuel pump and or reeds??

fast eddie · Dec 6, 2010

powdercrav said:
have the same thing on my 05 M7...runs clean higher up but at home it stutters. gonna check and clean the powervalves like everyone here suggested...then maybe fuel pump and or reeds??

I did clean my valves did'nt change anything for me, which I don't think it would since it runs clean at one elevation and not the other, I also put after market reeds in with some other mods and it seemed to magnify the issue at home anyway, hav'nt been to any higher elevation yet either.Keep me posted if you figue anything out though, good luck

mulestar · Dec 7, 2010

Ha, that's funny, that is why my bro won't let me touch it. Claims it runs perfect in the mountains and that is all he cares about. Very interesting indeed.

Damon8 · Dec 7, 2010

UPDATE

Alright, my friend cleaned his power valves last night and said that seemed to help. Said it cleaned up the mid range a bit, but its still a little fluttery at low r's, however, its not as bad as it was. He hasnt ran it in the moutains yet, we'll be headed to west yellowstone in February so it will be interesting to see if the altitude change helps like it helped for some of you. I'll let you know if we find anything else out.

Thanks everyone

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2004 M-7 153 mid-range flutter/burble Help!

Damon8

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XFIRE800

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Damon8

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hllrazor

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tatorsalad

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undercat

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