GTR O2 Sensor Problems

[YardJunky]

I have Just worked out that the GTR conversion in my car has been running without the heater wire in the O2 sensors connected.

So the O2 sensors just sat there at 0.3V because the power was not hooked up to get them to operating temp. So ECU thinks its LEAN

Now I have rectified this & the O2 sensors are now putting out 0.6 - 1.3v constantly thinking the car is RICH.

The system never seems to enter the closed loop operation where the 02 sensor voltage contantly fluctuates between 0&1V

When I drive the car with the sensors connected, it has misfires & loss of power between 2-4000RPM (seems very rich).

With them disconnected it runs fine.

(I have reset the ECU & it did not help)

Can Anyone help / seen this before?

Forgot to mention, have already replaced these o2 sensors recently, on the advice of a certain workshop!

[paulr33]

the 02 sensor isn't meant to cause idle problems and misfires/power loss as its only used when not wide on throttle, the sole purpose of the 02 sensor is to tell the ecu it can lean out when not on full throttle so the system can save fuel

Otherwise with no 02 sensor or a dead one or not connected the ecu never gets told this information and just runs mega rich all the time to be on the safe side

When r33s are using craploads of fuel (full tank @ 200kms) its most likely due to the 02 sensor being dead, they are only supposed to last 40,000ks before they die and dont give any feedback