Chevrolet: car running rough, fuel pressure regulator, auto engine

Question
1990 corvette (5.7) Auto - engine oscillates whether stopped or running. Have replaced EGR valve, rotor cap & rotor. Getting ready to replace the fuel injectors and the fuel pressure regulator. Any help would be appreciated. Thanks

Answer
There were lots of problems with shorted injectors in this veh. especially if it is stored for awhile like over the winter.
The injectors can be very expensive. You might be better off having it properly diagnosed first. It will be cheaper to have it diagnosed than to throw parts at it and hope for a fix.