Ok heres the deal. Got one of the those fancy autometer air/fuel ratio gauges. got a new oxy sensor put end on the wires plug it into my gauge put it in run it. now with only the engine on it looks like it reads accruate ( says rich and my nose says so to ) now when i touch the gas or turn one any thing ( and i mean anything, lights, stereo, blinkers, whipers ) it reads much leaner. so i first figured something wrong in the power to the gauge but the voltage there is good so i hooked up my digital multimeter to my oygen sensor its self to read the output. now here are where things get crazy. at idle everything off it reads about 750mv ( rich ) but anytime i turn anything on the reading actually drops from the 02 sensor. my stereo makes the reading go don to about 350mv ( near lean ) and when i give it a little gas it even drops more ( infact it started reading negative ) WTF . how/what is happening and how do i fix this ( this would really mess up a EFI car and i want to convert ) im stumped.