Hi. My name is Walter. I am a newby. I do have a decent technical aptitude but not sure about this? I have a 94 LT1 Z28 that I would like to change the stoich from 14.7 to 14.4 to slightly enrichen my engine. I am having trouble passing California smog test and wondering if the E10 we are using these days is causing my problem. I do have Eehack and 9495 and a cable. Not sure if I should try this myself or not. Where do I start! Thank you!