I started my cossie up from cold this morning. The ISCV was still disconnected and the idle was really low. So i plugged the ISCV back in and the revs were going up and down for a few seconds then it sorted itself out. I took the ISCV out used brake cleaner to clean it and used service lube and lubricated. I refitted the ISCV and the revs were still Going up n down. Could this be a faulty ISCV.