Depending on how long this problem has been going on -- could it be just a simple issue as a tank of bad gasoline ? Just a thought.

 

Ditto You using Top Tier gas?

 

My 2019 has been doing the same thing for a year or so. Purrrs like a kitten once it's warmed up.

 

I have personally never experienced rough idle of any kind on my 2017. Turns over really quick, though in very cold weather it may crank a bit longer before it starts, but not anything significant.

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 1200-1500 rpm initially, and then as the engine warms a bit the idle point throttles down in steps until it reaches around 800 rpm.

I would say if you see any abnormality in normal cold start idle rpm ... then you have an issue that needs to be evaluated.

 

I'd look at the spark plugs, before aiming the Cannon.

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

Take a picture and post.

Another possibility is an out of calibration temp sensor. You know, the cylinder head sensor that the ECU uses to enrich the mixture for cold running. Had that on a kid's Toyota once.

 

Disconnect battery, clean throttle very well and assemble back. Very easy and low cost.*

*Usually, the 1.5t looks a little more difficult.

 

Doesn't the Gen V have a MAF/MAP sensor? If so, how can you access the throttle bottle without disturbing the sensor? I hear those darn things are super sensitive to movement.

 

I've never had a problem with them, but I guess if the car has been running, they could still be heated. I would perform on a cold vehicle because the sensor will probably be jostled at some point.

 

Same problem with our ecoboost fusion, not yet qith the V, its normal for direct injection, depending on the oil and how you drive, oil forms a varnish at the intake (gum) and causes that vibration while warming up, it also worsens the MPG, no matter if you use top tier gas, gas system cleaners, you have to manually clean it, look for direct injection intake cleaning procedures.

 

so I've just been lucky then with my 19', as I have not experienced this, but will in the future right?

 

I'm having the same issue. Will be going to the dealer and I'll post findings when available.

 

They are replacing all injectors