I seem to be having a bit of a problem, I just put on a new intake manifold on my D16y8. I am having a idle problem, it is bounicing from 1500 to bout 2500 rpm i've heard that it might be the IVAC. I'm getting a new 1 today as I speak, but I also noticed that the tempeture is also acting up. I goes up and down when I am driving da car and the gauge almost gets to tha top. Does any1 have a idea of what it might be, is there possible a coolant sensor or would it be marbe stuck thermostat. Any help or input would be great THANKS a bunch