Nissan Sentra 93 problems

Hello, I have problems with my vehicle is a Nissan Sentra 93 has an E16 carburado engine 4 cylinders 8 valves, the problem is that in the morning it costs that matched, I have noticed that sometimes the lights are lit more when I accelerate it a little and they are attenuated when they stop doing it, it also feels a flame in the engine, after slowing down, this happens in cold, it will happen in cold, it will happen in cold, it will happen in cold? This is a Pokito Gaston, if someone has the data of how the valves are calibrated, I would also appreciate them!

Thank you already for your answers !!!

The lights is actually the alternator's regulatory box to get out of doubts prove with heating at a speed and if you notice that the lights are raised and the heating together is that the alternator's regulatory box is the one that is not regulating and there is an excess of current passage from the alternator to the battery

The calibration of the admission and exhaust valves 0.22mm (0.009 ")