weired thing happened and cant work it our

[swindon_s14]

changed my engine (again) in my car last night
all running sweet all day
but had a bit of fun ie bounced of red line for a few seconds and now she is tickin over at 17oo rpm
were it was 960 before on pfc

check few things still drives and boosts fine
any ideas people ?

[harrysx]

vacume leak?

[swindon_s14]

thats what i first thought but checked every pipe i can see
had boost leak before and i belive the idie is up and down :S
this time i just sits nicely at 1690 to 1705 rpm