Why does my car stall when the temp is cold?
If this sensor is telling the computer that the coolant temp is at 200 degrees, but it’s actually only at forty degrees, the computer will command the injectors to introduce the wrong amount of fuel for a cold engine. Once the engine gets hot enough again, these problems disappear and the engine runs normally. maffeidj July 5, 2016, 8:40pm #7
Why does my car idle more in cold weather?
You might end up idling for a longer period of time than you would in warm weather as the engine begins to warm up. The cold start injector in your engine adds more fuel until the engine reaches the proper operating temperature to compensate for the cold weather.
What makes an engine run and idle without stalling?
Every engine needs three things to run and idle smoothly without stalling: a correct air/fuel ratio, sufficient idle speed for the idle load, and a good spark. If any of these is lacking, the engine may stall. Cold stalling problems are the most common because the engine needs a richer fuel mixture to maintain idle speed until it warms up.
Why does intermittent stalling occur in a car?
One of the more unusual causes of intermittent stalling we’ve heard about is a defective vehicle speed sensor. When the vehicle stops moving, the PCM may not engage the idle speed motor (carbureted engines) or idle air bypass motor (fuel injected engines) so the engine will idle normally.
What causes an engine to stall in cold weather?
Engine stalling problems can be hard to find and are often sensor or temperature related. Engine stalling is more likely to occur during cold weather or when starting a cold engine. So, this kind of engine stalling problem often means the engine is not getting enough fuel and/or too much air.
Why does my car stall when I start the car?
Engine stalling problems can be caused by, almost anything but, are usually sensor related. A cold engine needs a fairly rich fuel mixture to start, and to idle smoothly while it warms up. What do you look for when the car starts to shake and sputter eventually causing engine stalling.
You might end up idling for a longer period of time than you would in warm weather as the engine begins to warm up. The cold start injector in your engine adds more fuel until the engine reaches the proper operating temperature to compensate for the cold weather.
What causes Ford Focus to stall in cold weather?
According to Ford TSB 04-21-13, a cold stalling problem with 2003-2004 Ford Focus models with 2.0L SPI engine during extremely cold weather can be caused by a faulty PCV valve that sticks open, allowing too much air to be sucked into the intake manifold.