Hey guys I have a 1993 z28 m6 its my baby... anyways I think my opti is going bad the car run really rough when its warm and it sputters at low rpms and struggles at higher rpms usually above 3k. A couple days ago i pulled the radiator and fans out to get a look at the opti i checked all the connections and everything looked fine. also the cars plugs and wires are about a year and a half old. If I do replace the opti should I replace the water pump aswell?

 

Have you scanned it for codes? Have you checked the fuel pressure? How many miles? Original Opti?