I really hate to post this, but I'm about to pull my hair out with this. I hooked up my code scanner up to my car the other day because I'm having a bad backfiring issue so I figure I would start with the codes. So hook it up I hear all the relays come on blah blah blah but I get no feedback for codes so thought it was my scanner when bad so did the jumper test and looked at the check light. Still nothing so maybe they were both bad unlikely but hey ya never know. Went and got a different brand scanner actron light audio scanner still nothing. I've tested all my grounds using jrichkers chart still nothing. Changed out the computer too just for chits and giggles. Can anyone help me out here?