i got a g35 with a busted cluster . i replaced it and all is fine until i replaced my O2 sensors .

now my tachometer and speedo meter would work when i start my car but after 2 mins of driving it gets no signal (tachometer went out first then the speedometer).

i have an ultra-gauge hooked up to the car as well and i can still see the rpm reading hence i dont think the sensor or wiring to the sensor/ecu is screwed but i cant see the speed since i think the speed sensor has a connection to the cluster

Can anyone share some experience on this? i got the cluster brand new . and am pretty sure it is working fine .

thanks a lot .