Fiat Seicento - Power Loss, Choking, Jerking: Tried Candles, Cables, Stepper Motor & More

Hello gentlemen, I count on your help
My seicento loses his power and chokes and jerks
I was connect under the computer could not connect to the driver
I was looking for thinking, maybe this or maybe that
Replaced
Candles + cables
Stepper motor
Fuel filter
I was cleaning the fuel pump
Throttles cleaned the injection also
Tomorrow I will see if the catalyst has fallen apart

But I mean driver in general
If I buy it on scrap metal, I can put it in and the car will go normally, I heard that it is enough to remove such a white cube from it, is it true someone can explain how to do it
Thank you for every hint and I count on you

If you could, give some more parameters, what engine it is, which year, etc.

And tell me how the engine is idling? Equally or not?

If you manage to buy it without immo, you will start it. We are talking here of course about 900.

Seicento 1.1.1000 idle speed sometimes increases a little

How is it Did you check the catalyst?

You can still look if it certainly doesn't take the left air somewhere, i.e. all the hoses etc.

The catalyst is in good condition, you have a good way to check the left air

Piss on the snake with a walking engine. If the revolutions start to go crazy it means that the sucked suck is there and you have a hole there. You can use the starter - the same principle.

miki1203 wrote:

But I mean driver in general
If I buy it on scrap metal, I can put it in and the car will go normally, I heard that it is enough to remove such a white cube from it, is it true someone can explain how to do it

Before removing the screw, unscrew the fuse box (three 8mm wrench screws). If there is no immo fiat code behind it - it looks like this (the color may be black)
https://i.ebayimg.com/images/g/snMAAOSwi0RX1piv/s-l300.jpg
then the engine controller is coded, then you won't fire your engine unless you take this immobilizer, engine controller and ignition key because it's a set. Even if you do not have a Fiat code, you need an antenna - the loop from the ignition to the immobilizer - if you do not have in your car of course.
The best option if the one you want to take with you is not a fiat code immobilizer - check also on the wire - the loop from the ignition switch if it is not there you can easily fire your on the one taken from another car. You can also search for punto 1.1 IAW6F.SB control box with the inscription FIAT 176 1.1 CM SPI ECOL. these ecole were factory mounted without a pair of immo so a greater chance of unencoded

It would be best to connect it to the computer anyway. I suspect that this is an SPI engine for which one of the electrode forum members wrote a very good diagnostic program.
Did this choking etc start suddenly and does it occur in any particular conditions etc?
Symptoms may also indicate the shaft position sensor ...

There is a 3-pin input and you need to specify + 12V separately on the interface otherwise it will not connect but you should know it. As for jerking - the MAP sensor is important in this respect - its vacuum hose from the throttle to the sensor which is screwed to the injection controller. The injection indicator lights up when this fault occurs when it rags and mussels?