Apexi Pen Turbo Timer Problem

[Nissan-r33]

Hi i have an apexi pen turbo timer it works as i should however when i connect the 02 sensor wire to monitor O2 voltage it makes my car miss and run strange, has anyone one had any problems like this? Also with the 02 wire disconnected the timer will read .9v does anyone know if this is right? I was thinkin maybe its sending a voltage back at the 02 sensor and causing the problem.

Thanks lars

[paulr33]

just leave the 02 signal disconnected, its pointless and achieves nothing as its from the narrowband sensor

you might have cut the wire instead of splicing it, which is why it might be running like ass

[Nissan-r33]

Oh so i can use it too monitor my 02 sensor? It runs fine aslong as i dont connect the 02 wire.

[paulr33]

the pen timer is able to display 02 sensor value and also guess how hard the engine is working based on the sensor ranges

its pointless and achieves nothing, you can just leave it disconnected (to the timer) but make sure the 02 sensor runs to your ECU