hi all, just bought my first 300zx, 91 plate non turbo, auto, I've noticed the water temp gauge hasn't moved whats the likley cause of this? any halp b appreciated

 

and my speedo has had mph convertion but its.... well like its retarded!!! its slow to climb and drop no matter how hard i brake or accel and doesn't seem accurate again any help would be great??

 

Thanks all

Hi check the metal pipes coming from the front of the engine there should be two connectors/sensors on the pipe, ones to the ecu & ones for the guage if i recall, pull em off check for corrosion and clean.