Punto with engine revolving, poor gas acceptance and illuminated tell-tale

Hello Comunity, have a big problem with my loyal Punto. It started that I was refueling and the engine didn’t get started. After trying several then went. Had on the highway and ignition dropouts And luminous motor control light that went off and on. Then I switched ignition cables ignition coils spark plugs and it went again. Just this control light always stayed out and goes on. I switched ot enger on it because there was a cable break and from some The main pump relays also went on. I changed the air temperature sensor, coolant temperature sensor, map sensor plus hose without success. The problem remains, the motor control light goes on and off, and the car is partly running at the gas. The funny thing about the whole thing is that as soon as I turn on the light the control light disappears and the car runs out of time to jerk well. I drive without light. He doesn’t run well and doesn’t take good gas. In addition, this lamp always lights up. BittrPlease help me….