Mrw

Hi newbie question. I bought a r33 gtr last year and it was running fine. Not used it over the winter but this year I have changed the oil new plugs and coil packs and now it runs really rich. On the software on the laptop it looks like the AFR isn't registering as the lambda gauge doesn't move. It gets it's reference from a innovate system. I have replace lambda sensor and it is reading fine and a gauge on the dash but not at the ecu. I would appreciate any help with fault finding the problem