forester 2005 - funny accelerator behaviour

so, have a quick question maybe someone had an idea what it could be;
its a 2005 forester 2.0xt manual, throttle cable model.

accelerating (any gear) changing gear UP the revs rise quite fast about 500rpm when clutch is pressed.
they drop fairly slow to meet the rpm of the next gear. it means i have to clutch very slow.
it does NOT do this when i change gear DOWN. the rpm fall normally and fast when clutched.

anyone any ideas?
no fault codes, greased the throttle cable yesterday. it feels good, as does the clutch.
should i clean the throttle body? is it a map thing? clutch switch? (but that would read a fault code...)

thanks for any help, hope to change this as its a pain in the butt when pushing on a bit (it spins the clutch)

sounds to me like it needs a clutch

clutch is fine... had a new clutch fitted. feels more like ecu or sensor/switch.
maybe it still is the throttle cable but not sure

idle control valve maybe.

but in fairness without checking only guess work on a forum

Oh I know dave, just on the off chance someone would know the problem.
I'll run it thru diagnostics again and have a closer look... I'm clueless as to
what it could be lol

[quote author=Neelie link=topic=35779.msg410133#msg410133 date=1349168874]
Oh I know dave, just on the off chance someone would know the problem.
I'll run it thru diagnostics again and have a closer look... I'm clueless as to
what it could be lol
[/quote]

I see you have no engine light so diagnostics wont really work, either trial and error doing it yourself or give it to someone that knows them

Yeah ill let Joe have a look at it and see. Maybe its just the map...

You sure its not clutch???... you should be really slipping a new clutch because of this.

I would be testing it to rule it out