Welp. My car had a misfire this morning after dropping my son off at daycare. I’ve driven it 32 miles since picking it up from the shop after the engine rebuild. No hard driving or anything...

I was accelerating away from a light under 1/4 to 1/2 throttle, and the CEL started flashing at about 45 mph @ 4k RPM or so. Thankfully I was running BTSsm at the time, so I saw it throw a couple knock events. I pulled over and checked the logs and tried to pull the CEL codes. Guess what? No codes! Obviously I didn’t want to drive it since it was idling rough, so I had it towed to the shop that did the engine swap. After talking with them for a bit we all agree it’s probably something simple like a cracked igniter coil boot that just wiggled its way off since the car was sitting for so long. That or a cracked vacuum hose. Fingers crossed...