Aiuta Mazda 323 Modello 2000

Mazda 323 Model 2000, 1.6 liters, in the plane it works normally if the engine does not strive, when climbing pending in a strong march (first and second) on some occasions, perform some electricity or fuel cut and turn off, the battery moves the engine but does not start, if I leave it for several minutes it come back normally, it does not turn on check light, I have changed the fuel pump but antier I could not give me problems Repair it, if someone can advise me, Ti ringrazio.

Controllare che il tasto di contatto può essere il chip di contatto se lo hai

Grazie per la raccomandazione, ma la chiave non ha chip,