Idle Issues... 1.8 16v

[C.A.R.]

I had this years ago with mine. In the end I couldn't determine whether it was the TPS or the ICV, but replacing both solved it. I think the ICV was about £60, the TPS was second-hand.

I would doubt the lambda to be an issue - I had lamda problems on my 1.8 caused by a blocked catalytic converter, the lambda never was able to establish that there was a problem until the engine had already warmed up - ie. it was never an issue immediately after start-up.