could be your fuel relay but It sounds normal. bouncing revs is mormal when the fan kicks on and off. The range is a little more than what I remember so have the dealer check it out.
I think that's normal on 2010, mine jumps too on idle, never tried nuetral while moving..
Try to get the latest re-flash from the dealer..
The manufacture supposedly fixed this on the '08 X's but they didn't. Tephra has it fixed with his latest bin, as well as Cobb on their v1.07 OTS maps.It a stock intake on there, so could there be a problem with the intake?
Hence the comment about idle RPM vs temperature. As the weather gets colder it will start not going away...Mine does the same until the engine warms up
That has nothing to do with idle or cruising.
Sadly no, the Cobb v1.07 tune does not fix this idle issue.The manufacture supposedly fixed this on the '08 X's but they didn't. Tephra has it fixed with his latest bin, as well as Cobb on their v1.07 OTS maps.
If fixed it with mine. Mine used to bounce all over the place until v1.07. They increased the RPM's in the lower temperature range of the idle map. Idle bouncing around may not always be the tune. You may have something else going on.Sadly no, the Cobb v1.07 tune does not fix this idle issue.
To date I still have this same issue with the funky idle (until the engine warms up) even after getting the Mitsubishi reflash, with the stock intake and with my AEM intake, and with or without my Cobb tune (v1.02 through v1.07). In addition, I've replaced all relays, and secured the fuel pressure sensor line.
My gut thoughts are this is a MAF issue.