just got my swap done a couple days ago h2b f20b in a 99 si. i got two cel's on start up.
cel 3 map and sell 7 tps. the map was because i had the positive and negative swapped. so i swapped them around and no more cel. the tps is alittle different. i used my multimeter
and was getting 5v positive and 5v on sensor when the tb was closed. when i went to wot it droped to .45 v. shouldn't that be the other way around?? i did take the tps off before i put the motor in. is there any way i could of put back on wrong???

 

Since your getting CEL 3(MAp sensor) and & (tps) im guessing you have the plugs swithced around. Unplug them and swith the tps and map and that should fix your problem.