Need to replace the coolant sensor. Not the tempture sensor.
try testing the battery
its too cold
Most diesel engines are hard to start when it is cold. Plugging the diesel engine block heater in will help the engine start.
It is not so much hard for a car to start when the engine is cold as it is easier for a car to start when the engine is warm.Cars that are hard to start in the cold are usually not new cars any more and because of wear and tear there is more likely to be something that doesnt work as well. when fuel is warm it ignites more easily.
BAD STARTER OR TIMING OFF LEAKING FLOATS
They seem to freeze a little in cold weather.
It means it is very hard to start and keep running in cold weather.
800 to 900 is plenty even in colder weather.
My 1991 740 volvo turbo doesnt start specially during the morning.Is it comes with a cold start valve?
Hello Have you check the Coil ? A lot of them go bad . and give you a hard start when Cold . stop using low grade gas can be causing water in fuel lines to injectors.89 or higher and use heet additive to gas to prevent freezing.this should help with hard start in cold weather.
check igntion coils
Start by checking the temperature sensor for the computer