AyooZander

My car gave a misfire after a race on cylinder 1. I didn't think much of it and ordered plugs to replace the ones i had. While I was changing them I emailed Eurocharged to see what gap I should set them to for bosch zr6sii3320 and they said 0.024. During this time the car wasn't smoking at all, even after resetting the code and driving for an hour. Within cylinder 1 a piece of the electrode of the spark plug had broken (4-5mm). I used a camera to check the piston and walls which looked like it didn't have any damage or the electrode inside so I assumed it blew out of the valves. After running the bosch zr6sii3320 with the new gap the start/stop function didn't work until 5 minutes of driving initially then when it came back on the car would start to smoke on a test drive. I left the plugs in for a week because i thought it was just burning oil at first but after a few errand runs throughout the week it was just getting worse. It was mainly when I was on the throttle or idled at a stop. Cruising down the highway at a steady rpm is fine until i give it gas or come to a stop from a exit ramp to which it would dump smoke. When I pulled out the plugs they were super black. I swapped them to new bosch plugs with a 0.028 gap and have still been getting the smoke which followed up with a misfire 3-4 days later. I did a oil change about 2 days ago to see if that would help with only 1200 miles on the oil. When draining it, the oil was black and thin with a smell of gasoline along with the oil filter being collapsed. With the new oil in, the car would only smoke worse than before. I was wondering where should i go from here to see what damage i have potentially. (cheapest to most expensive)

Robert AMG

iTrader: (1)

First do a compression test for all cylinders, if all cylinders are ok change all coils.

AyooZander

Update on the situation, The car blew the plug going 170+ mph after shifting into the next gear. If you drive your car as hard as I do, I recommend going for a Step 1 colder plug like NGK, I was running a Bosch plug ATM. It grazed off the tiniest piece of the piston not making it fully round, turbos I sent it off to get built as well for peace of mind. Plus side, A stage 2 Eurocharged CLS63 with all 4 windows down from a 40 roll is a car length faster than a 21' GT500.