How do I fit a Lambda/ Oxygen/ Air-Flow Sensor???

[TotalControl]

Right peeps, i have purchased a Lambda Sensor for my Celica ST202 (finally!) and wish to install it myself. I tried to locate the current one today just to acknowledge where the thing was and couldn't find it!
Was wondering if any of you guys have come across this issue, the engine is a 3S-GE. I would like to be able to change it myself as i'm pretty cash strapped and would also like to learn a bit for future reference.
So, what is the correct procedure in locating, removing the old and installing the new sensor?

Cheers guys
TC

[TotalControl]

Anyone? I cant seem to find any diagrams on the net. Can anyone point me in the right direction?

[bint]

Hi, try 6gc.net or www.celica-club.co.uk - from memory though, and this is based on an ST not a GT, the lambda is the one in the exhaust and the air flow sensor (MAF - if I'm thinking rightly) is the one into the air box...........

However, I never needed to change any of mine so couldn't say for sure. There is a wiki guide on celica club that has diagrams etc and links to how to's as well as lots of owners who have done the same.

[cptsideways]

Its just below the manifold, you already have one btw. Why not just plumb into your existing ones output to a guage?

[TotalControl]

Right, the lambda sensor went on to be fitted, only to find out that the downpipe was rusted at the sensors links! Downpipe has been ordered as of Thursday and should be with me by Wednesday. This is costing me too much! Thanx for your help anyway peeps.