My 2016 grand touring LE 900 ACE was idleing rough. I noticed it after my first ride of the season (20 min) yesterday (May have been doing it prior but didn’t notice it)
Further points
- rough idle stayed at 1200 rpms
- sound like a very faint ‘spark’ during rough idle (Hood was vibrating)
- I tried a number starts and a couple times it would cough but wouldn’t turn over
- when lifting on jack stand, I engaged the throttle to 2000 rpms and rough idle noise was gone
-new battery was installed 3 months ago along with valve cover replaced under recall ( no rough idle then)
- fuel stabilizer added end of last year
- always ran 91 octane
- during the quick ride I took, the acceleration was fine and no notice performance issues.
Dealer can’t get to it for a while so wondered if there’s thoughts that a novice sled guy can explore?
You can add some seafoam to tank and run for a while then let sit once mixture is in system. Start it up again the next day. See if it cleaned anything.
Oh definitely put new gas in it! Sta-bil is junk imo. On any sled, siphon out left over gas in the spring and put in fresh just before first start of the season. Rule of thumb that has let me avoid any gas/ethanol issues.
No the new gas will act as a cleaner for when it goes through the fuel system. Your idle SHOULD clean up after some run time, maybe some nice full throttle pulls do get those injectors opening and closing a lot.
The worst thing you can do is start it every month, you are going to build moisture and load your plugs. Just put it away, let it set and start it in the fall. You may have a fouled spark plug. Easy way to tell if you do not have a heat gun, is start it up and touch each individual runner on the exhaust manifold, if one is cold, you have a dead hole.
To winterize or summerize a 4-strokenfor storage I siphon off the tank empty.
Add Aspen or VP non mixed fuel...and run engine so that fuel gets into the engine.
Then fill the tank with Premium NoN Ethanol and add some Octane Boost.
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