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stef-gsi
18-11-09, 10:31 PM
im not going to be running a cat, do people still plug the 02 sensor in or just leave it disconnected. ive got the coil pack engine by the way.. cheers
craig green
18-11-09, 10:47 PM
Connected.
ant_tay
18-11-09, 10:59 PM
Connected.

you should have it connected but you dont have to if you dont it will not like starting and idleing when cold i have run a mk3 astra gsi with the later engine without one
craig green
18-11-09, 11:02 PM
You unplug most of the sensors & it would run badly.
stef-gsi
18-11-09, 11:12 PM
connected it is then! thanks for quick help
ant_tay
18-11-09, 11:40 PM
You unplug most of the sensors & it would run badly.

mine ran fine when it was warm and strated ok when it was warm only had a problem on cold start with the o2 sensor not connected
Rich
18-11-09, 11:53 PM
no o2 sensor can cause all sorts of problems. Its the sensor that sorts the fuelling out for you, if its faulty or not connected it will over/under fuel, run crap, no performance