I need help troubleshooting on 98 fbody ecm 16239740 . After making some changes for the fan controls, computer is not able to pick up on throttle position sensor. I have flashed back to old working tunes from years ago with same result. I have found from 2007 where someone had issue with hptuners writing wrong data for fan controls causing them not to work. Wondering if this is similar issue and need help to resolve it. I was ready to just replace the ecm, and even bought one. But when contacting support, they were extremely firm on no credit transfer/refund/discount. I have couple of other vehicles that I was saving credits for and do not see it reasonable loosing 2 credits/$100 on this.