My 1995 camaro Lt1 runs real bad. Starter seems to have trouble to turn the engine around. If lucky it fires up for a while missfire badly. I have changed opti and water pump but it runs exactly as before. Today I unplugged the water coolant sensor on the waterpump and when turning key to crank car shut off all electrics. Its completely dead. Plugged in the sensor and electricity is back. Is it supposed to do so?