Lambda sensor on mk3 cavi

[Ectotec]

Lo peeps, could anyone tell me the effects of disconecting the lambda sensor on a mk3 1.6 cavilier???
I thought it wouldnt run right but it seems to idle/run fine and doesnt seem to be a prob in that dept. But, i have noticed it has been burning some amount of petrol, i reckon it has nocked the Co out and is telling theECU it needs more petrol cos of lack of oxygen it (thinks) its not getting!??
Could anyone clarifiy this or correct me??
It passed a pre MOT check with no CO probs!??
cheeRS for the info in advance!
Dave

[Ectotec]

Wits up, nae 1 know wot a lambda sensor is?
C'moan!
Dave lmao

[Rob_S]

why disconnect it in the 1st place?
but what will happen is that the ecu will register a fault of no voltage from lambda and a complete set of default values for everything will be inputted giving fairly poor performance (its called limp home mode)

[Ectotec]

The reason for disconecting it was that me mate got an exhaust for nought (his car) and it wasnt the correct exhaust,. but it fitted, so instead of buyin a new one which would of cost £££ we stuck this one on but noticed it didnt have the lambda sensor on it so we left it disconected, i knew it wuld have some effect on performance or emmissions etc but it ran fine, although it is a bit sluggish as u describe!
Thanks for the reply & info mate.
cheeRS
Dave

[Rob_S]

fair enough
it will run ok with no sensor, but not as good as it should of course. ideally drill and weld in a lambda sensor boss and plug it back in.

[dathers]

It wont make any difference at all at full throttle as they only work at idle part throttle,unless its a wideband sensor,which it wont be as they cost loads and a standard ecu would only use it as a standard sensor anyway.
Drill a hole in the exhaust and weld on a nut of the correct thread for the lamda sensor to screw into.
The lamda sensor quite an important item for good running,fuel economy and performance.
Dave

[Ectotec]

CheeRS lads, damn lambda sensor's!
Dave