hi all ive got a problem with my s2 its running ofab efi

when i conect up the iscv the revs rise to around 3k for a few seconds then settle to 1k but every time you touch the throttle it happens again, with the iscv disconected all is ok the idle is fine and revs ok have tryed a different iscv but still the same was ok when running ofac


was ok running ofac then changed these parts to run ofab

ecu ofab with 165 chip
ofab map sensor
inlet manifold (was powder coated)
throttle body
beige injectors

any ideas please