I swap a ZX in a 91 civic hb. i did all the wiring. Engin started fine at first atempt. but i hear the main relay buzz and now engin won't start, our live more than 1 seconde... And NOW! i have no power to the fuel pump and injector when ignition is ON. Is it a comun probleme, main relay?
Yes, especially in the older cars- your Civic is 15 years old! Take out the main relay and inspect it.