Help please,I have a1227727 ECM which has been running fine but now with a wideband innovate gauge fitted the afr is running at 10.5 to one and the ECM blocklearn is maxing out at 160.The oem narrow band 02 is still insalled with the wideband 02 fitted across the pipe from it. The ECM is also dropping from closed loop to open loop until the engine has run for over 20 mins.I have checked all connections and all seems well,fitted a new 02.In open loop the afr is running around 15.1 to one but as soon as she goes closed loop the block learn rises and afr drops to 10. The 02 crosscounts is about 3-4 per second but the voltage only changes from around 450mv to 600mv
can anyone spread some light on this please ????