Car Won't Warm Up

[Asmar]

Stock '95 S14. Car won't warm up. I thought it was the thermostat (as that's almost always the case in these situations) so I replaced it with an OEM Nissan thermostat. Car still won't warm up. Am I overlooking something else that's preventing the car from warming up? Searched around and couldn't find an answer.

[Agamemnon]

Is the heater blowing hot air?

If the thermostat is indeed operating as intended it may be a faulty temp sensor. There are two of them. one for the gauge and one for the ECU to help control fuel ratios. If you car runs rich check both.

[92SEric240sx]

Temp sensor for the gauge in the block- probably went out on you

[jedi03]

use laser thermometer to check actual running temp, if hot replace your sensor, if not check the sensor...if not hot thermostat or possibly fan clutch

[jimcfl]

Could also be a bad ground. Sometimes brand new thermostats stick open, but an open thermostat will still let the car warm up, it just takes a lot longer.

[tuzzio]

Running a stock gauge or after market?

Never trust an s-chassis oem coolant temp gauge.

[Pandemonium]

are you getting heat? hows the coolant level? is the air all bled out?