currently i have a 92 LS speed witha B18b1 with pr3 pistons(11:1) with skunk2 and full exhaust. It seems if i have it in 4th gear cruising at 4k, it will just stall like the gas pedel isn’t there. i let the RPMS fall to idle and bang, right back to normal.

Could this be my TPS? I flashed my codes and i got 17 and 26, 26 even exist?

17 is VSS, is your speedo working, no 26 either.