Rough running on cold startup

The build up is on the intake valves, which causes insufficient/inconsistent air flow into the cylinders. During cold start, the vehicle runs ...

That is a classic symptom of a leaking head gasket. Coolant drips into the cylinder during cold soak. When you first start, it takes a few ...

Based on my limited experience, common reasons for rough idle when cold include: Vacuum leak at intake manifold that closes when metal warms up.

Sure, normally the air filter will cause an extremely hard start. Which could also result in the fuel mixture being rich or in older terms ...

Hi there, for a few weeks now my car has been stumbling during the first 30 seconds after starting it, it sounds like it is misfiring with a ...

Welcome! Here are the parts I used in this video: Delphi MAF Sensor: https://amzn.to/3X366kB Map Sensor: https://amzn.to/3ZpZvSO Intake ...

This could be an airleak after the airflow meter, any air dragged in here isn't 'seen' by the ECU and so not compensated for and can lean the ...

The P050D code stands for “Cold Start Rough Idle,” which indicates that you're experiencing an engine rough idle when starting from a cold state.

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 ...

Rough running at cold start is usually a vacuum leak. It only happens while the engine is in open loop control. When in closed loop control, the ...

Your rough idle morning start problem could be uneven compression in the cylinders. Check the mechanical things first, like the cylinder ...

All need to keep in mind that rough idle at startup is completely normal. This is the tumble generator valve (TGV) system doing what it is ...

Engines need to run rich when cold, so the ECU dumps more fuel into the engine than is actually needed until it warms up, think of it as full ...

what is the idle rpm initially? It should be roughly 1200-1500 rpm initially, and then as the engine warms a bit the idle point throttles down ...

Site Navigation ... A leaking injector would cause an extended crank due to the fuel pressure bleeding down overnight. When the engine starts it ...

When you start the vehicle, it is flooded and running extremely rich - thus the rough running engine. If you restart the engine while warm - ...

A rough idle can be caused by (CAC) charge air cooler leaks. Also check that crankcase oil is not overfilled as a rough idle can result. Also ...

Could be that, or possibly a vacuum leak that goes away as things warm up and expand. I know for a while, there was an issue with intake ...

I think what you might be experiencing is a lack of oil flow through the engine on cold starts which causes a rough(er) feeling. Try using a ...

Look into the cold startup cycle. Is temp readout the same from the dash as the scan tool reading? Perhaps there's a Pressure issue with with ...