just purchased a 98 LSC on EBay. I live in Omaha purchased the car in Ohio. Drove to pick the car up this weekend. 700 mile trip! On the way home the car developed a misfire. For about 500 miles the check engine light was flashing. Bad miss around 40 to 60mph. Smoothed out around 80mph. I know driving with the CEL flashing is a no no but I had no choice. Being 500 miles away from home I couldn’t afford a tow so I drove it all the way home. My exhaust is not smoking nor to I have any foul smells. So I hope I didn’t damage the cats. Is there anything else I should look for besides a coil or plug??