rite guys im having some problems with my knock sensor.. i have jus installed a b18 in my eg, i have installed a knock sensor and ran the wire to pin D3 on my obd1 p72 ecu... when i reset the ecu and check for codes, im throwin a code 20 and that is it... as soon as i start my motor up and give it a lil rev it throws code 23 knock sensor.... would could the problem be? i've checked all the wireing and its fine... the motors got around 30k on the clock so it shouldn't be knocking at all, sounds like a really healthy motor, wot could the problem be? faulty knock sensor? plz help! thanx..