Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Problems after engine swap › Problems after engine swap November 15, 2019 at 2:46 am #895287 Marcus OsborneParticipant No lights come on. My mechanic had his Snap-on scan tool hooked up to the car sitting in the passenger seat. No codes were thrown and no lights showed up on the dash. That is what has me stumped.