Mistergee

[hr]I have an 88 5.0 i just installed some exhuast. long tubes headers, 3 inch x pipe.and flowmaster single chamber mufflers with dumps. now my car is sputtering at low rpm and it back fires after i let out on high rpms. my car is basically stock. im thinking its the fuel pump. or distributer. but if any one knows wat it might be plz aim me or let me know. thnks alot

cleanfitty

Did you cross ant plug wires while you were installing them??