Ok.
[attachment=19295]
So I have SORT of found the fault.
Running the arduino from a battery behind my seat and no connections between car and arduino other than sensors.
And it all works ok.
There is still a weird poor continuity between earth on the car and the arduino which is bizarre.
Thing is...I dont really wana have to drive with a spare battery for the arduino...so Im now scratching my head as to how to sort the problem now I have sort of found it!!!
[attachment=19295]
So I have SORT of found the fault.
Running the arduino from a battery behind my seat and no connections between car and arduino other than sensors.
And it all works ok.
There is still a weird poor continuity between earth on the car and the arduino which is bizarre.
Thing is...I dont really wana have to drive with a spare battery for the arduino...so Im now scratching my head as to how to sort the problem now I have sort of found it!!!
Wishes for more power...