1994 Pontiac Sunbird 2.0 engine When the car is warming up it has heat but after you drive it for mile you lose heat and it blow cold air have replaced the water pump and thermostat?

thermostat can be stuck open

It could be that the thermostat is stuck open.

Yes! Thermostat stuck open. Replace thermostat. It could, but the thermostat is normally open when the engine is warm so you should only notice this when the engine is cold or warming up.

The Explorer could have a stuck open thermostat. The thermostat needs to close until the engine gets up to operating temperature to make the system heat properly.

Could be several reasons, first one I would check would be a stuck open thermostat.

You do not need a thermostat in your car for it to run, however having a thermostat will keep your cooling system from working while the engine is warming up, which means faster warm up time which leads to better efficiency and less wear and tear.

Follow the lower radiator hose from the radatoro to the engine. The lower hose is attached to the thermostat at the engine. Are you haveing problems with the engine warming up but the heat not blowing as hot as it should? Consider the heater core.

Did you replace the throttle body warming plate? To bleed properly run the engine THEN undo the coolant cap and top up to full - do not undo when cold as the expansion tank is lower than the head of the radiator, always use orange extended life coolant Dom www.landroversalvage.ca

Engine thermostat malfunction, temp below normal range. Basically the engine is not warming up fast enough.

The most likely cause of a long warm up time would be that the thermostat has jammed in the open position

It means that the engine is not warming up properly, possible thermostat failure.

P0128 says the engine isn't warming up to proper specs. Start with replacing the thermostat.

It's Pontiac that's your problem.

When you start the engine, the thermostat is closed. After the coolant warms up the thermostat begins to open up allowing coolant to flow thru the raditor. When first started the temp will go a little past what the thermostat is set to open at. After the water begins to flow thru the radiator, the temp will fall to whatever the thermostat is set at. The thermostat holds the coolant in the engine until it…

The warming caused by Global Warming.

If you are certain that you have sufficient coolant, and the heater is not warming up adequately, check the thermostat and/or water pump. If the thermostat is staying open the engine coolant will not heat up enough to provide heat inside the passenger cabin.

my s- 10 did the same thing i replaced to dist cap rotor and plugs it helped

Steady surface temperature increases were noted between the 1970s and 1990s.

YES...IF IT HAS STOPPED WORKING IN THE CLOSED POSITION THEN THE HEATED WATER ISN'T FLOWING THROUGH THE HEATER CORE.

You CAN just remove it; but that introduces another set of problems. The computer monitors the engine temperature, and if the engine is not warming sufficiently the computer will start to report a fault. A cold engine does not perform as well, and if the thermostat is removed the engine will not be able to reach operating temperature. The thermostat restricts coolant flow into the radiator while the engine is cool. Once the engine warms…

Global warming is warming the air. It is also warming the land and the oceans.

A bad thermostat can cause a decrease in gas mileage. If the thermostat is stuck open, the engine will tend to run cold. Not only will this result in a perpetually low temperature gauge reading and poorly performing heater. It will also cause the ECU to richen the mixture, since the engine will appear to be warming up to the ECU. This will result in poor gas mileage. Replacing the thermostat will allow the engine…

Global warming is not important. Global warming isn't happening. Global warming is happening but it's not our fault. Global warming is happening but we can't do anything about it. Scientists are not sure about global warming.

No the warming is only a warming of the atmosphere.

The troposphere is warming because of global warming.