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Arctic Cat: M Series 2005-Current, all models in the M-series chassis
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  #1  
Old 01-11-2010, 04:57 PM
boondocker97 boondocker97 is online now
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Default Starting Issue

So here is an interesting problem that I hope someone on here can help us figure out. The sled is an 09 M1000 LE with y-pipe, can, reeds, koso egts, and boondocker box. Only about 750 miles on the sled.

The problem is that it doesn't want to start, sometimes. First occurrence was on the last ride last season. Running great shut it off for a break in riding then it took about 15 pulls to start it. Didn't even try to fire on any pull until the one it fired right up on and we just thought it was some kind of fluke thing.

The first ride that the sled had been out this season (yesterday) we were digging it out from being stuck up in the trees and the throttle got bumped ever so slightly and the thing just died. Got it down to the trail and worked on it for about an hour looking at the wiring to try to get spark back to the motor. We even unhooked the throttle safety switch. Gave up and started towing it back. Dad tried to start it while he was being pulled and it started after about three pulls.

Sled was running great other than if you put it in reverse it would not come back out of it. Motor would slowdown and restart again, but it would still be in reverse. We shut it off and restarted it and then it was in forward mode so he just started riding it back to the truck.

So we were still heading back to the truck and we opened it up down through a meadow and when we stopped at the the end to regroup he said the speedometer was acting funny and only showed 40-50mph when mine was showing 80 with him being ahead of me. He pushed a button on the speedo head and it died again just like before - no sputtering or hickups just died like you shut the key off. Throttle switch was still unhooked. Started towing it again and it fired right up when he pulled the rope. Continued to ride it again. Tach was doing funny things when the sled was idling but the motor was running smoothly-not like the tach indicated. Stopped on the side of the trail for another group of riders and it died but restarted again.

Shut it off when we got back to the truck and would not restart. I pulled it backward and pushed it forward across the snow about two feet and then it started first pull again. Went for another short ride and the sled ran great. Tach was working, didn't try reverse, throttle switch unhooked.

We've called a good dealer we know and even called Cat directly and neither one have heard of the problem and couldn't tell us anything. We were thinking that it is either someing in the speedo head interfering or the reverse module. BD box is working fine along with the egts and belt was off during towing. Sorry for the long post but this is a rather annoying problem we would like to figure out. Any suggestions?
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Old 01-15-2010, 09:14 PM
boondocker97 boondocker97 is online now
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Default

any ideas?
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Old 01-15-2010, 10:32 PM
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Were you adding to much fuel with the controller and flooding it?
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Old 01-16-2010, 10:20 AM
msandrews81 msandrews81 is offline
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Default

A buddy of mine is experiencing the exact same problem but we havent figured
it out yet. We havent noticed a problem with the speedo yet but it does seem
like an electrical issue. The throttle switch is definetly acting up at times but
after a hard ride and shutting it off it doesnt want to start. It will start eventually after sitting for a while. I dont think it is flooded. Holding the throttle
wide open and trying to start has no effect and once it does start it has to idle a bit. If you touch the throttle even a little bit it will die. I dont think it is getting fuel. I suspect the fuel cap is not venting and causing a build up of vacuum in the fuel tank and once it is shut off it cant get enough initial fuel pressure to start. next time it happens were going to remove the fuel cap and
see if it starts. I also think the injectors may be getting too hot since he removed the shield for the oil delete. I will repost if we figure anything out.
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Old 01-16-2010, 11:48 AM
0neoldfart 0neoldfart is offline
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Default Couple things to check...

I've had a similar issue in the past - the following list is where I'd start.
1. check the harness below the y-pipe heat shield - it can rub through the insulation and ground out (no spark).
2. Do away with the throttle safey switch (including harness) and run a tether cord - my harness grounded out on the bars.
3. Check the harness under the fuel tank - some were not routed into the relief molded into the tank, and results in pinched wiring harness.

Good luck, and please note that the harness may "look" ok, but you'll see slight discoloration of the wire sheathing color, or may look like a thin spot.
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Old 01-17-2010, 05:20 PM
boondocker97 boondocker97 is online now
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Default

Its not flooding, there is no spark when it happens. BD box only changes the fuel system not ignition. Cat is telling us that there is most likely gremlins in the spedo head, but they have never heard of a problem like this before so I guess we'll see.
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Old 01-17-2010, 11:32 PM
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Default

I had the same problem you guys are describing, 3 good rides since I replace my coolant temp sensor no issue's yet. Read this link and try unpluggin your coolant temp when your prolems come back, might get lucky.

http://www.snowestonline.com/forum/s...d.php?t=188075
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Old 01-18-2010, 10:45 PM
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Is the coolant sensor the wire with the yellow connection near the coolant reservoir?
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Old 01-18-2010, 10:50 PM
Ski-Laxn Ski-Laxn is offline
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There was another post like this the guy replaced the wire harness no mor problems.
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Old 01-19-2010, 12:34 AM
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Old 01-19-2010, 02:46 AM
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Old 01-26-2010, 12:27 PM
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Old 01-31-2010, 03:46 PM
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