Hi my Buddies GF has a 1988 cutlass supreme FWD v6 and it just wont run right. It will run fine at idle and through first gear but then starts to break up real bad in second and third. He can nail it a idle and it picks right up but in gear (2-3) it just pops. so far he has replaced wires, plugs, IAC, TPS, dry gas put in and new gas, We are at a loss... It has only 82,000 miles on it. Can anyone give me some ideas plz, Thanks in advance