I have a Nissan Primastar on a 56 plate (2007). a few weeks ago I accidently put petrol in instead of deisel. The petrol was successfully all siphoned off without the engine starting. However on the digital fuel gauge all the graduation bars are flashing on and off all the time along with low fuel icon illuminated constantly. I have tried a new fuel sender unit but the problem still exists. Any ideas

Alan Peet, June 2011