Problems at the track

Hey guys when i race my 01 gt auto at the track i have some problems. Ever since i put the 3500 stall torque converter in, ive had problems with the check engine light coming on, odometer reads blank miles, overdrive light starts flashing on and off. This usually occurs after i stall the car above 2000 rpms, and launch. Rpms then drop and car slows down. . Has anyone ever had this problem before? Thanks for the help

-Hypertec power programmer
-4-10 gears
-70mm throttle body
-M/T Street Et's
-3500 Stall converter