Skoda Fabia - on a cold engine - turns, does not start, nothing has helped so fa

I have a problem with my factory.
Born in 2006, engine 1.4 16v / 80KM, station wagon.
Serviced at an authorized service station, garaged.

The car has been 100% reliable for ten years! Unfortunately, about half a year ago, sporadic problems with firing after the night started to appear - in the morning it fired 2-3 times, until one morning it did not start anymore.

In the spring, there was an inspection at the ASO.
Timing replacement in early June.
The battery is new.
Candles replaced some 50,000 km ago.

After replacing the timing gear, the problems got worse. After two weeks, it just didn't fire at all.
The car has been taken to the site. The engine fired on the spot, but it pounded terribly (there was also a very intense gasoline smell) - by eye (or in fact an ear), not all cylinders were running, which the mechanic confirmed.

The service found a clogged throttle and damage to the engine controller, as a consequence it was supposed to flood the engine and therefore it did not start. After cleaning the throttle and replacing the controller, it was supposed to be ok.
After returning from repair, however, the problem did not disappear. After the overnight stop (and there are no low temperatures now), it spins normally, and then either goes out, or starts with a thud in 2-3 times. After a while the pounding stops and starts to spin nicely. Interestingly, during the day, the hot engine has no problems with starting. Once it fires, it goes nice, smooth, without pounding or other "special effects"

Please advise what could be a potential problem. What to check first? I want to report some specific details when I return the car to the site. I do not want them to push me some kit, stretching the costs, trying to blindly replace other components.

Hello. It looks like a problem with the valves and if they have self-regulators, the oil comes out of them, and they have these knocks. Bad opening valves can cause this type of problems, when the self-regulators are inflated with oil and there is no large valve clearance, the symptoms disappear.

Hello, did you manage to diagnose your Fabie, I have identical problems with mine, I mentioned the same things as you, unfortunately still without a positive result.

And did anyone connect these cars to a service computer or another and checked if there were any errors.
Because you don't mention it.

If you have any idea about electronics or you have a friend who has it, I suggest you take a look at the engine temperature sensor. Symptoms indicate it, but the ASO should have diagnosed it. Even if there is no error, it should be checked for increasing or decreasing resistance. The fault may be that at a given temperature it does not work properly with the temperature, it reaches the correct resistance and everything returns to normal until it cools down. Symptoms include a problem with firing, engine not running smoothly due to a mixture composition disorder, etc.

Skoda had the temperature sensor, fuel filter, fuel pump, candles, coils replaced, lambde checked, the gas system has been thoroughly inspected by various gas engines to exclude LPG. Honestly, I have no idea what is the cause of the morning difficulties with firing, when it fires, it shoots, the revolutions fly until it warms up. It is true that when driving on gasoline there are such short moments between the change of the head that it feels as if it was slightly choked, if it is on LPG it flashes like this doll, the same is emergency firing on gas - from the first old age. I am slowly wondering if the problem is not the fuel injections, because there is not much left to replace in this skin. Normally no errors pop up ....

It turned out to be an engine temperature sensor failure. After its replacement, the problem was resolved.

ASO only ASO. Go to them now and let them give you the old parts and let them take the new ones. Of course, the money for the work can also be returned. It is unbelievable that such a simple ASO defect would turn out.

The temperature sensor does not always show a failure on the computer and ASOs do not have time to check the old way. If only the computer does not show them the fault, it means that everything is ok with the car and they give it back ...
So I hit correctly? ?

jarekgt1 wrote:

at ASO they do not have time to check the old way

So what is it for ASO? All my life I was convinced that the ASO or AUTHORIZED Service Station is as if "anointed" by the manufacturer, operating under his patronage with his guidelines, and should know his cars as well as the manufacturer himself. Unfortunately, from what I hear and read often, I was deluded. Services are more and more often crap without knowledge and experience, but they can decently delete naive customers ..

In ASO they delete properly, unfortunately the employee is not so well paid. Someone who has knowledge won't be sitting there for that kind of money. That's why people work there whose approach to work is what it is. Take the computer from them and have the car repaired and this is where the Dealership ends ????

There are cases where the sensor, despite the fact that the damaged tester sees it as good. Those who repair know what it is about (and ASO in particular), the rest does not have to.

Yes, but it takes 15 minutes to check it. You leave the car overnight, plug it in in the morning, when you have 12 degrees and the sensor sees -30 or +80, that's probably clear. You fire up and watch the temperature rise, you compare it with a clock sensor, a pyrometer and what the conditions allow. If you put it right, all you need is a K thermocouple and a meter for PLN 20. The rest about ASO colleagues wrote earlier. Now a letter to the Škoda headquarters.

[quote = "ladamaniac"] Yes, but it takes 15 minutes to check it. You leave the car overnight, plug it in in the morning, when you have 12 degrees and the sensor sees -30 or +80, that's probably clear. You fire up and watch the temperature rise, you compare it with a clock sensor, a pyrometer and what the conditions allow. If you put it right, all you need is a K thermocouple and a meter for PLN 20. The rest about ASO colleagues wrote earlier. Now a letter to the Škoda headquarters.




The engine temperature sensor is not the same as the liquid temperature sensor which gives these values to the clocks .....

And I do not understand this outrage at ASO. After all, only apprentices work at ASO, people who can do something without a computer or other helper / supervisor do not work for a bowl of rice and go somewhere else. This is obviously obvious.

[quote = "jarekgt1"]

ladamaniac wrote:

Yes, but it takes 15 minutes to check it. You leave the car overnight, plug it in in the morning, when you have 12 degrees and the sensor sees -30 or +80, that's probably clear. You fire up and watch the temperature rise, you compare it with a clock sensor, a pyrometer and what the conditions allow. If you put it right, all you need is a K thermocouple and a meter for PLN 20. The rest about ASO colleagues wrote earlier. Now a letter to the Škoda headquarters.




The engine temperature sensor is not the same as the liquid temperature sensor which gives these values to the clocks .....

That's why you can compare, one housing, two sensors. Anyway, the Vag group has already given up on it, that's why a pyrometer or a thermocouple. Anyway, how the temperature will jump by 30 degrees in a few seconds up and down, you probably know.

Hi guys,

I know this reply is very late since the last post. But I live in Australia and have been having the same problem with my 2019 Skoda Fabia where the engine won't start first time in the morning when it's cold. It will come up with multiple fault codes on the dashboard before then turning over and starting on the 4th or 5th go.
If I wait until later in the morning, say 09 am, then it starts ok.
I want to replace my engine temperature sensor as it looks like other people with Skoda Fabias on other message boards have been having the same issue and finding replacing the sensor solved it.
My question is about whether the coolant temperature sensor is the same thing as the engine temperature sensor? As I'm struggling to find anything online about the engine sensor, just the coolant sensor.
Sorry if this is a stupid question but I want to make sure I order and change the correct part.
Cheers
Jacob