Liberty 2007 deadspot 2000-2500rpm

[wazza23]

I have a 2007 Subaru Liberty 2.0R Auto.

Had it since new. Haven't had any issues with it since.

The past 12 months I have noticed quite clearly that when accelerating the engine seems to 'stall' when it hits 2000rpm till it hits 2500rpm then takes off again.

So it accelerates normally till 2000rpm just hangs at 2000 for a couple of seconds – then despite increased gas it takes much much longer to get to 2500rpm – then just shoots off.

It is really really annoying!! I have serviced by the book since the start and ONLY premium unleaded since the start.

None of the services places know what is happening, and of course when I want to show them the problem it reverts back to normal.

Please, any advice will be appreciated!!!!