a little help
i have a 97 civic lx with a jdm b16a swap i am using a usdm p72 ecu and i want to use a chipped p28 or a jdm p30 when i use these ecus my vtec doesnt work i am using a obd2a to obd1 jumper harness but when i use my obd2a p72 the vtec works can anyone help me
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