mini me swap,questions
 

hello ,thx for looking, i have swapped a d16z6 head onto my d16y7 blockbought a p28 chipped ecu from someone,(dont know him),,and obd1 to obd2 connecter,when i run the engine with the chipped p28 runs terrible, i use my original ecu,all good. any suggestions on why it runs so bad?. thx.