Rough idle when the engine is cold only

Rough Idle on cold start : r/jetta - Reddit

During cold start, the vehicle runs rough because it's unable to compensate for the change in air flow. When the vehicle begins to warm up, it's ...

Rough idle at engine start for 1 or 2 minutes, then runs fine all day ...

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

Why does my car idle rough on a cold start? - Quora

if rough it is either too rich, too lean, or the ignition system is in poor shape. EFI: On a cold start the computer reads the engine coolant ...

Rough idle when cold | BobIsTheOilGuy

I had a vehicle with that problem.It would spit and miss when cold then run fine when warm.Turned out it was the intake valves caked with carbon ...

Rough idle when the engine is cold only | EricTheCarGuy

I am having some rough idling issues upon starting when the engine cold. The RPM drops to about 500 and if i try to drive it, I have to press on the gas pedal ...

My Car Has a Rough Idle When Cold: 6 Possible Causes - HubPages

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 idle only in cold weather | Toyota Nation Forum

a wiring / loose connector, or other issue with the Engine Coolant Temp (ECT) sensor, or Air Intake Temp (AIT) sensor are things I would check ...

3 Things to Check if You Have a Cold Start Rough Idle - YouTube

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

What Does It Mean If My Car Shakes While Idling? | Hollenshade's

When you notice that your car is idling rough, it's an indication that something is amiss with the engine's performance. It could be caused by ...

Q&A: Troubleshooting Rough Idle on Cold Start | JustAnswer

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 engine out ...

Engine idles very rough after cold start in colder weather - GenVibe

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

Rough idle smoothes out when warmed up - IH8MUD Forum

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 ...

Rough idle at cold start? | Honda CR-V Owners Club Forums

Assuming it is not just some bad fuel... first question.. when you start the engine cold.. what is the idle rpm initially? It should be roughly ...

Q&A: TROUBLESHOOTING ROUGH IDLE at COLD start -

Usually oil can get in the valve if the breather passage in the valve cover is clogged due to some possible sludge in the top of the engine.

Rough idle on cold starting, with CEL | Honda Element Owners Club

It wasn't the throttle body! Rough-idle-on-cold-start kept recurring. Here's what it was: the engine was slightly low on oil and after I added ...

Rough idle in only cold weather. - GenVibe - GenVibe

Most likely you have a vacuum leak. The intake manifold gasket is suspect. It gets drenched from oil that comes in through the crank case ventilation system ...

Really rough idle only when cold - StarQuestClub.com

It could also be a fuel issue. It was mentioned that the injectors could leak down leaving too much fuel in the intake manifold. When you start ...

Rough idle when cold, perfect when warm? - ThirdGen.Org

More, and it will be too lean and will cause a rough idle and stalling, but will clean up as the engine warms up. You should also check the fast ...

Rough Idle only when cold. - Honda Odyssey Forum

You may not want to rule out intake/vacuum leaks so quickly. If it is an intake gasket, then it is possible that it will "seal up" as the engine ...

Rough idle only when cold start | Toyota Tundra Forums

IF you can get a sense that the motor is running way rich, then I would troubleshoot the coolant temp sensor. It's possible that the sensor ...