2002 955i Issue I've Made.....

Hi guys

2002 Speed Triple 955i - UK....

I've just replaced the pipes that go from the IACV to the throttle body with 1/4 silicon vacuum hose, as the old ones were perished and split.




Just reassembled everything, starts OK, and will idle, but when I blip the throttle, the revs drop and it cuts out. I can hold the throttle open at say 2k - 3k RPM, but let go, and cuts out.

I guess I've done something to the IACV - any suggestions? (I did not knowingly change anything, just connected the new pipes).
Thanks.