wither48

Hey all,
Working on a rev up vq (06 g35 sedan) and trying to solve an over heating issue. Car will overheat when driving, but also just when idling and trying to bleed the coolant. Lower hose is cold, upper hose is hot, so I went first for a thermostat. After that didn't solve it, I figured it must be the water pump (heater is ice cold even when the car is up above 220? on my scanner). The odd thing is that the temperature gauge on the dash is reading cool of center the entire time. Even when the fans turn on their highest setting with the AC off the gauge still shows it as warming up.
Has anyone else experienced this? The water pump I installed is aisin btw.
Thanks all

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