grayis250

The car start and idle fine but it will die when i drive it or rev it pass 4k rpm
2001 is300
aristo motor
aristo ecu
aristo engine harness
aristo air flow meter
5 speed swap as the same time
single turbo kit

i just jump the diagnostic box it give me 2 code 39 and 21. code 21 is main o2 sensor and i have 2 on my car.where is the main o2 sensor ?please help guys

99 GS3

iTrader: (14)

The main O2 was directly after the twinturbo outlet. So when you went single where did you reinstall that o2 sensor (if at all)?

You GE motor had 4 o2's, two pre cats and two post cats, the 2 post cats you can leave removed/disconnected as they don't effect how the ecu runs the car. If you used the complete aristo loom and aristo ecu you only need to deal with one sensor.

I also assume your using a VVTI/161 engine and ecu??

Got a pic of your engine bay?

grayis250

thanks for reply 99gs3
the car is running on stock 2jz gte ecu and harness. the main o2 sensor is right behind the turbo
i will post some pix of my engine bay soon