When is engine is cold it studders and misses but when warm?

When engine is cold it studders and misses but when warm When the engine is cold it studders and misses but when warm it runs great and it only happens when I start it and go but if I let it warm up before I go itll run like it should what would cause this issue when the check engine light isnt on and there is no codes on a computer?

What causes a misfire after a warm up?

Misfire After Warm Up: Misfire After Warm Up. Runs Great When Cold… Misfire after warm up. Runs great when cold. Has new engine new plugs wires injectors when starts misfiring can shut down start back up and runs fine until a few minutes then starts again. have the same problem? This sounds like you have an intake valve that is leaking.

Why does my car run fine on warm starts?

Apparently the ECM is doing something different (setting up the engine operating parameters differently) on warm starts compared to cold starts, and whatever that is, it’s sticking for the duration of the trip. So on warm starts, it starts up fine, and runs fine indefinitely.

What to do if you have a cold start Misfire?

Check spark plug wires if possible, try to replace them to see whether the result will change. For conscience ‘sake, clean throttle body and idle air control, this procedure will never be superfluous. The cold start misfire is often associated with malfunction of Mass Airflow Sensor (MAF), so firstly check this part.

What causes a cold engine to misfire when starting a car?

Drivers often face a misfire problem when starting the cold engine. Namely, after starting the turn number is decreased, there is uneven exhaust and smell of unburned fuel, the engine starts to «misfire», and as the engine warms up, the vehicle starts to work smoothly with no visible signs of engine problems.

Why does my car run fine when the engine is cold?

Maybe there are two problems. The first is that the car should run fine even on cold starts. That could be due to an air leak, or a fuel pressure problem, either could cause a lean mixture, which would be most noticeable when the engine is cold.

What causes a car to miss when warm?

So saying this problem is caused by a small vacuum leak and the system its self compensates while car is cold would be fine if we only have issues at idle, but we have them at speed. I am still thinking of a mixture problem that turns into a flat out miss when warm.

When does a Dodge Durango stall what time?

Stall would only happen while car was in Drive (not on startup), and was always immediately re-startable, albeit in the middle of a f***ing intersection. Mileage crept down from 14 to 10.5mpg.

Why does my Dodge Ram run till warmed up?

When starting truck cold, it runs perfect. After truck warms up starts to idle bad, and also starts making a loud suction noise like a vacuum leak. There’s no vacuum leak ,the noise comes from the throttle body. If I turn off the truck and turn back on , it starts up fine till 5 min. later when it starts all over again.

What happens when you start a car in cold weather?

When you start the car, you will notice that it idles high for a period of time until the engine warms up. This is the enrichment cold start process. This is done with what is called a cold start injector which injects more fuel into the motor until the engine reaches a specific operating temperature.

What to do when your car engine is cold?

When an engine is cold it will need more fuel to run correctly. I would recommend having the fuel injection system cleaned to see if it helps to run better. If the flush does not work then a scan will be necessary to see if the engine’s air and coolant sensors give the correct reading when cold and as it warms up. If either one is off, replace it.

What happens when you run straight water in the cooling system?

If you are running straight water in your cooling system then you are taking the chance the water will freeze in the motor and cause damage to the engine and cooling system. It sounds like you may ether have a leak somewhere or the coolant is being burned in the motor due to a potential blown head cylinder head gasket.

What are the symptoms of a Ford 4.0L misfire?

Here are other symptoms your 4.0L equipped Ford will experience: The check engine light (CEL) is on. The check engine light flashes on and off when the engine is experiencing the misfire. One or more misfire codes (P0300-P0306) will be stored in your Ford’s PCM memory.

What are the symptoms of a bad coolant temperature sensor?

Hence, it is advised to have your car inspected right away to avoid any serious problems. Here is a more detailed list of the common symptoms of a bad coolant temperature sensor. One of the first symptoms you will notice is that the check engine light will activate.

What are the symptoms of a misfire in a Ford?

The basic symptom of a misfire is a light to severe rough idle that’s felt when the engine is idling and a light to severe engine miss (hesitation) when the engine is under load (for example: your Ford vehicle moving from a stop). The check engine light (CEL) is on.

What’s the Cold idle RPM on a Ford?

Cold idle can be as high as 1500 RPM, but should lower to around 750 RPM for this vehicle once warmed up. This could be an air leak into the intake area of the engine; an auditory check…

What causes rough idle after engine has heated up?

At this point, if you turn the truck off and back on again, it will idle fine UNTIL you rev the engine at all, at which point the truck will start shaking again, and idling really rough.

Why does my GM V8 engine misfire when cold?

Because, GM V8 engines are very prone to a rough idle and engine misfire when cold. The check engine light may also come on, with codes P0300, P0171 and PO174. But, as the engine warms up, the engine misfire or rough idle tends to go away; which seems confusing.

Why does my car have a rough idle when cold?

One of the most common causes of rough idle on a cold engine is a faulty ECT sensor. This sensor signals the car’s computer when the engine’s coolant is cold or hot, so the computer delivers more or less fuel to the engine. A cold engine requires more fuel than a warmed engine.

What causes a hard start when the engine is warm?

Leaking fuel injectors cause fuel to leak into the combustion chamber. That often doesn’t cause problems on a cold start because most of that fuel has evaporated between the last shut down and the cold start. But leaking fuel can cause an extended crank and hard start when hot and then a rough idle for a while when the engine is warm.