ok, so does anyone know what the Intake manifold runner position sensor does? my wrx threw this code, and it wont start. It gets spark to only two of the coils on the driver side but not on the passenger side. I was wondering could the Intake manifold runner position sensor make this happen? also could a ground wire make it not work if disconnected. Im not sure where all the ground wires go and I can't find any info on the web so any help would be great.