3800SC manual CASE learn (Page 1/1) Additivewalnut AUG 24, 04:35 PM Car got swapped recently and has a different car's ECM in it, when I go WOT my timing goes to -6* and the car falls flat on its face, under the impression I need to do a case learn. Read around and saw the write up from Darth about what wires to ground from the pcm to trick it into thinking it's in park. Only part I'm unsure about is which wire at the brake switch has that +12v and 0v when pressed in? olejoedad AUG 25, 07:43 AM If your Fiero was originally an automatic, the wire at C203-P comes from the brake switch and supplies the needed voltage to the PCM. Additivewalnut AUG 25, 11:09 AM Sorry, forgot to mention that it's a 4 speed car from factory. quote Originally posted by olejoedad: If your Fiero was originally an automatic, the wire at C203-P comes from the brake switch and supplies the needed voltage to the PCM.