2000 Buick LeSabre
P0300 - Random Multiple Cylinder Misfire
I'm starting this thread in case someone is able to help. This just happened today while driving on the freeway. The car had only been driven for about 10 minutes after start up. I was supposed to shut the engine down immediately to avoid catalytic converter damage, but I chickened out and drove the car the rest of the way home - about 1 mile. The engine was running very rough and would barely idle. Once I got it off idle, the engine would smooth out. The catalytic converter was ticking very loudly after I got the car home and shut off the engine. Also, there was a strong burning candle wax smell present in the air. Recent work done was a rear rocker arm cover gasket replacement and the two coolant elbows were replaced. I did the work myself. Today when I got the car home, I checked and double checked to make sure everything is plugged in and hooked up. Everything appears to be well connected.
Thank you for your time and consideration.
