OK so it goes like this...I noticed a leak in the radiator. No big deal, replaced the radiator and the oil/transmission cooling lines. Its been about a week now and and I'm having some major problems. If the car hasn't ran in a while it will start fine and run fine....for about 10 mins. Once the car is warmed up it runs horrible. Very rough idle and extreme surges no matter speed or rpms. My first instinct was the head gasket. No residue on the oil or cap or spark plugs, no white smoke or sweet smell from exhaust, no coolant residue in exhaust. And then my low coolant light came on. Is it possible this could be a cooling problem? Or should I look into vacuum seals or the throttle body? I'm stumped....

93 Seville sts 120k miles

 

Car is not throwing any codes either