i added a vafc to my boost setup ecu(uberchip) for fine tuning. i am now throwing a code 21 which is the vtec spool. do you think its a bad solder or something else. before hand i wasnt able to get into vtec but this is when it threw a code. the ecu is a p06 with that has been modified to turn on vtec but it doesnt seem to kick over. im running a t3/t4e on it and it runs alright but not sure whats going on. its dark now so i cant do any soldering anyone have any ideas. im assuming it might be a bad connection but if it isnt what else do u think would be causing this other than the ecu or a bad connection. thanks.