Runs a little rough on cold start

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 ...

Carbs : On a cold start a choke is applied and a fast idle mode is enabled to allow the engine to run with a richer mixture. properly set the ...

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 ...

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

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

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 ...

Car has rough idle at cold start. becomes better when it warms up. but still a bit rough. i have replaced Coils paks ... rough running. As ...

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 ...

Engine Coolant Temperature (ECT) Sensor ... One of the most common causes of rough idle on a cold engine is a faulty ECT sensor. This sensor ...

Check the mechanical things first, like the cylinder compression to rule that out. Look for other clues like the color of the coolant in the ...

:rolleyes: Start engine, if running rough, stop immediately and compare condition of plugs. (Any wet with gasoline? Are the gaps all to spec?)

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 ...

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

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 ...

I've been having this weird issue for a little while. Basically, when I cold start the car it runs rather rough. Sometimes (happened 5 times ...

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 ...

Mine did this and I ended up having a blown headgasket and cracked head. After sitting for awhile coolant would leak into the cylinders and make ...

Therefore the oil pressure is goes from basically zero to it's low limit at start up. Producing a quick blip of the gas makes higher RPM and ...

- The choke should open slightly, 1/8" - 1/4" depending on the temperature. - The engine should run fast, but smoothly. - If the engine is ...

Mine was leaking coolant from the head gasket only when cold and caused it to run rough for the first 10 to 15 seconds of start up after sitting ...