If it is not overheating then the temp gage or the sending unit are bad.
Idle the engine, remove the temp sensor wire on the engine and ground it. If the gauge does not move one can assume it has failed.
Your 1994 Honda Civic will overheat when the thermostat is malfunctioning. The overheated engine can experience the idle to surge. The engine should be turned off immediately.
Low Coolant or faulty gauge
Normal engine operating temperature is 190-215 degrees F.
My Altima had that problem and it was the water pump going out. It started with temperature gauge was moving, but then it started leaking and finally the heater stopped being warm at idle.
In cold weather, you'll notice that the engine temperature gauge registers only slightly or not at all, particularly if you're driving at highway speeds. You'll also notice that the temperature of your passenger compartment heater isn't nearly as warm as usual. Your car will show a temperature if you allow it to idle for several minutes. The heat flowing into the passenger compartment will be warm as usual. If your thermostat is open, the engine will rarely warm to a level you're used to seeing on the temperature gauge.
No............... Just let the engine get to its operating temperature and service it out at an idle only......
The idle control valve works by regulating the idle speed of the engine. The idle speed of the engine is usually controlled by the engine of the computer.
The fluid level in an automatic transmission in a 1995 Dodge Truck should be checked at idle in Neutral with the engine at operating temperature.The fluid level in an automatic transmission in a 1995 Dodge Truck should be checked at idle in Neutral with the engine at operating temperature.
because the air conditioner puts a load on the engine... check your cooling fan relays.. the fan should run with the air on at idle
Engine oil pressure will vary depending on if the vehicle is in an idle state or not. However, on average, it should be around 40, which is typically half of the gauge.
Car engine temp's increase at idle primarily because there is little or no air flowing through the radiator coils to cool the engine coolant. This is partly because the car is not moving, and partly because the cooling fan usually will not activate until a certain temperature is reached.
Install a vacuum gauge to a manifold source of vacuum (below throttle plates). With engine thoroughly warmed up and using a tachometer, turn engine idle speed adjustment screw down to 600 rpm. Start with one side idle air/fuel adjustment screw, turn it in slowly and watch the vacuum gauge. When the engine vacuum reading starts to drop, stop, then back out the screw until the engine just reaches its highest vacuum reading. Readjust engine idle speed to 600 rpm. Do this to the other side idle air/fuel adjustment screw then go back and do the first one again. After several times each you should be right on. Go back to the engine idle speed adjustment screw and set the rpm to factory specs.
The engine idle may be set to low to compensate for the AC compressor starting up. Rev the engine a few times to see if it stops. If it doesn't, there may be a problem with the AC temperature signal or motor mount.
You will need the proper gauge kit first. With the engine stopped install the pressure gauge with the shutoff valve in the open position. Start and idle the engine with the valve in the open position. Turn the wheel left and right several times to release any air bubbles and bring the fluid to normal operating temperature. With the gauge connected, close the shutoff valve for 5 seconds and compare with manufacturers specifications.
boost pressure, as you call it, will not show on gauge,if you have one, while engine is at idle the turbo pressure does not boost but runs all the time according to the revs of engine
because that's kind of a big engine
All engines must have a harmonic balancer instaled on them. Balanced or not. Hook a vacuum gauge to direct vacuum port on intake. That is a place that will have vacuum on it when the engine is running at an idle. Then read gauge and move the distributor until you get the highest vacuum reading. It should be 18 to 21 inches of vacuum at an idle.
Check Engine light is on. Engine OK when cold, but when reaches operating temperature it stalls at idle.
There are several things that can cause high idle. An older carbureted engine may have a vacuum leak or sticking choke linkage. Newer computer controlled engines have an idle control device called an idle motor which could be faulty or receiving bad information from other sensors on the engine ( IE. temperature sensor ).
Because your engine and therefore oil pump are turning slower at idle. It is a normal condition unless you hear rattling also at idle.
does the engine have a carburetor or is it fuel injected? A carbed engine has mixture screws along with a base idle screw, a fuel injected engine the idle is computer controlled.
If you have the correct weight oil in the engine, it sounds like the engine may be worn. If you haven't checked the oil pressure with a manual gauge (vs the dash gauge) that is a good place to start to verify that it is not a gauge/sensor problem.
Iat / Idle air temperature sensor was not used on that year.
sounds like it might be due to bad earthing. Check earth strap from battery to body to engine.