Well the second one which we put on was, not sure about the first one. I have ruled out ignition now anyway!? I think i could just see a little bit of noise on the trace as it was on a small time scale. I am looking at the ho2s at the min and when on a road test and the engine is WOT the reading keeps dropping from rich to lean when hessitation happens, an i right in thinking that it should stay rich untill i let go of the throttle?