1998 Chevy Astro missing fire

I buy a chevy astro 1998 last mount I drove it for a while with no prolem unless some miss fire on the hyway last week my check engine come on so I rent to a shop repair and the mecanic do some test code mutiple miss fire (fuel pump pressure and some) and everything\r\nwas ok so mecanic tell me that I need a tune-up I came back to my home and do the tune-up (spark plug wires dist cap rotor and ignition coil)after that nothing better rough idle engine stop at light fire missing on the hyway