Help! NEW cold start problem - Page 3 - HCS Snowmobile Forums

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Old 04-02-2019, 08:11 PM   #21 (permalink)
cfm
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do these have Idle Speed Valves? Sure sounds like an issue with one...but one needs diagnostic equipment( software/hardware to watch sensors live / fuel psi checker / spark strength checker / etc) to zero in on the problem like coolant temp sensor and other common problems.
The above did not get acknowledged. So putting it out there again.
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Old 04-02-2019, 08:52 PM   #22 (permalink)
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The above did not get acknowledged. So putting it out there again.
Very good thought. I guess i'll bring to dealer to test. Know any good Yamaha dealers in Mass or NH?
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Old 04-03-2019, 10:14 AM   #23 (permalink)
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Sea foam going in I'll run it some this weekend. Not sure if I'll sea the change now. Any other way to test a leaky injector?
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Old 04-03-2019, 11:48 AM   #24 (permalink)
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Sea foam going in I'll run it some this weekend. Not sure if I'll sea the change now. Any other way to test a leaky injector?

Not sure on testing, but Leaky Injector does make me think. Because when it stalls it sure seems like its flooded and not starving for fuel
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Old 04-04-2019, 04:00 AM   #25 (permalink)
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Watched the video posted same thing ours does. Only good thing is it has never not started lol. You just need to know how to start it which is crazy.
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Old 04-09-2019, 07:01 AM   #26 (permalink)
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Current Sled(s): 2014 Arctic Cat Sno Pro 7000
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following process of elimination - and riding in Maine as I do - have you changed the fuel filter? More cheap insurance. Have to remove a lot of plastic to get to it, but eliminates that potential issue - especially if you got some bad fuel somewhere....
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Old 04-09-2019, 03:04 PM   #27 (permalink)
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Sled has been maintained at a dealership with a open check book I would think so but not sure on fuel filter.
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Old 04-17-2019, 07:25 PM   #28 (permalink)
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Sled has been maintained at a dealership with a open check book I would think so but not sure on fuel filter.
I pulled valve cover, only 1.5hrs to get to that. Exhaust valves are tight, a few of them (.002) ugg. I got time so diving in, lots more to take off. Just found a .pdf of service manual, so that will help. Not sure if this is my problem, but will be done and eliminate one thing
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