poor fuel economy

[nosaj26]

shame we gotta thrash them to get performance!! end result - sh!tty mpg!!. where is lambda sensor and how easy is it to change + what exactly is it? thanks guys

[Len]

In the Bentley manual it describes it as an oxygen sensor and it compares the oxygen in the air to that in the exhaust.
Cant see a diagram of exactly where it is but it is definitely on the exhaust and would guess somewhere between the manifold and the cat converter.

[nosaj26]

il have a look in the haynes manual, see what it says

[irmscher]

I did the one on my dad's primera recently and it was on the front of the manifold right opposite the radiator, very easy to get to but just needed a special 22mm socket with a slit cut out (and was longer than a regular socket) to get the thing out...fitting was reverse of removal.

How much is a replacement sensor for a mk3 8v?  Might do my brothers as his is not great on fuel and inspecting his engine the other day i could smell some fuel vapours but couldn't see a leak anywhere... maybe it's over fuelling or is the smell of vapour quite normal on these cars??

[nosaj26]

never noticed smell before, thsat would concern me?? price about £50 it seams, anybody know chepaer?