Hello, everyone. After servicing the engine and the combustion chamber from my Matiz 2002, the vehicle started accelerating and decelerating by itself. After scanning it, I was told the MAP and TPS sensors were damaged. I replaced both of them and the car started burning spark plugs and losing power. I was then told it was the oxygen sensor, so I bought this sensor and the IAC as well in order to have all the sensors new. But things got worse because the vehicle does not even start working now. Occasionally, some combustion noises are heard and the vehicle starts and immediately stalls. Spark plugs are always wet with fuel. I've already changed the distributor cap, the rotor and the spark plugs wiring, but nothing got better.
If you repaired the engine and the camshaft was replaced, the most probable thing is that this is causing your problems. A generic camshaft causes all the failures you have mentioned. This happened to me and I only solved it when buying the original GM camshaft. Good luck!
Thank you very much to all of you for your help and suggestions. Finally, there were many problems, from a short circuit in the fuse box to a failure in a camshaft piece, where the distributor is placed.