ive been getting different answers from people but still no change i have a 97 civic lx i just blew my b16a2 so i swaped it to a jdm b16a ive been using a usdm obd2a p72 gsr ecu on both motors vtec worked always but ive been reading that running that ecu isnt to good so i went out and bought a chipped p28 and a jumper harness hoping i would plug it up and would work but no the vtec doesnt work so i thought it was the ecu so i went out and found a jdm p30 since it is maped out for my motor but no vtec either why doent my car like obd1 ecus can anyone please help me