Edited 02-Jan-06 - found THIS thread over on Scoobynet, which has an explanation of sorts. Just for those interested.
As most of you know, i have an 03-plate WRX.
In the engine dept, it's fairly standard - green panel filter, a Bailey VTA DV & a Ninja back-box on the exhaust. And thats all.
I've noticed recently that when i'm accelerating up thru the gears, the engine revs are staying @ the level they were at before i pushed the clutch in, just for maybe a second or two, then they drop down. It's like the accelerator is sticking for a second once i've taken my foot off it (but it isn't)
I'm 95% sure i'm not imagining it, and i'm fairly sure the car has only been doing this for maybe 2 or 3 weeks.
I know all the arguments about the dump valve, but i get the oil changed more frequently than subaru recommends. I did remove the VTA DV & tried to re-fit the original DV (to see if it cured this 'problem') but i'm struggling to get the metal clip that goes round the large rubber pipe expanded (the space is a bit tight in there!!)
If i need to take it to the dealers to have this looked-at (it's still under warranty) then i'll probably have to re-fit the original DV right?
Any advice much appreciated.