Intermittent starting and idle issue

[mattsrallye]

Thanks for the reply.
Crank position sensor is the only one I haven't replaced yet so that's the next step, I was expecting it to be back firing and all sorts if that went tho.

The amount of fuel to put in will be calculated by the ECU based on the amount of air passing through the inlet, which is calculated from the air pressure (MAP sensor) and the air temp.