Octavia2019

Air filter is changed couple months ago, this was happening before and after replacement. But I'll check it anyway.

When it is raining or really humid air, my Octavia 1.5 TSI jerking during the drive. It feels like it lose power for a milisecond and then drives normaly. Sometimes it will happen only once during drive, but sometimes it will do that couple of times. Beside that, car is working perfectly, no errors and when its not raining, this problem is not appearing. It is doing the same in every driving mode, with ans without traction control turned on, spark plugs are new, car battery is new. Also I've checked injectors, oil separator, pressure sensor, coils... everything is fine and it left me with only one question: How can rain affect a car? There is probably moist accumulation somewhere because it's not happening when I drive longer or when it's not first drive in the morning. This is happening ocasionaly for a longer period of time when weather conditions are like this, it's not getting worse/better, just the same whenever it rains. Car is Octavia 1.5 TSI DSG 2019 with 113.000 km.

Forgot that i started this topic. So update: almost 3 months no issues but it started again after couple days of heavy rain. I'm now sure that is somehow causing problem. Is there possibility that water or moisture is accumulating somewhere around engine?

Bosch spark plugs fitted and after a month mechanic switched to some other to check if the problem is there and no difference. Ignition coils same story. Car is behaving exactly the same. Air filter is MANN fitted two months ago. Maybe it can help to trace a solution that the problem is more "vissible" when its cold and wet weather.

It's Bosch. No, nothing else except this issue. I will check those definetly.

Scan showed misfire on multiple cylindres in the moment when this happens. Can ACT be turned off without causing problems to engine?

What can cause misfire? Spark plugs, ignition coil, injectors, car battery... everything changed and checked in the last two months.

My concerns are mostly if this continues, will it make more damage to a car. Driving up a very steep hill is a trouble, and car is doing this 3-4 times.

I have car since March '24 and Bosch spark plugs are fitted 2 months ago together with oil and filter change. Cam belt is not changed, it has only 110.000 km, is it too early? I have half a tank, and definetly will try to put most quality fuel on market in my country (Bosnia). Also, I think that some ECU update or reset can help since there is no anything on diagnostics.

Take a look at this video, I tried to cut and slow down a bit so you can see better. 20250105_115133_1_1.mp4

I press throtle and it goes to 1500 rpm and without moving my foot from a pedal it just goes back to 1300 rpm followed by stuttering. If I do it very carefully without pressing gas pedal hard, it won't happen.

Pay attention on rpm drop at the very beggining of the video. It stays in 2nd gear, around 1500 rpm it drops to 1200 but my foot is constantly on a gas pedal. When it does that, car stutter. Very annoying when going uphill (very steep hill).

Hi guys, do you know what can cause this slight loss of rpm when accelerating with my Octavia 1.5 tsi dsg? It's happening only when I press hard on gas pedal on low speeds. No errors on dashboard. Car is working perfectly in every other circumstances. Car has 110.000 km and new spark plugs, car battery, engine block breather and checked fuel injectors which are fine. Is this something about DSG? 20250105_115133_1.mp4