I just changed the spark plugs in my 2002 S60 base (non-turbo) using genuine Volvo plugs with 3 electrodes. I started the car and immediately had a rough idle and then a misfire on cylinder 1.
When replacing the plug initially, the boot separated from the coil with the metal portion remaining in the boot. When I had the misfire, I figured I hadn't put this coil back together correctly and maybe damaged it. I removed the coil, but when I pulled the plug only half of it came out. The plug was completely sheared at the base of the ceramic. i put one of the old plugs back in and an old coil from when I replaced them a few years ago. Now the car is running fine.
Do you think the coil caused the spark plug to break, or was the plug defective? Can a misfire break a plug? I don't want to keep running the old coil (it is one of the factory originals). I don't know if I should buy a new coil, or put back the one I have been running for a couple of years. I don't want to use it again if it might have caused the broken plug.
When replacing the plug initially, the boot separated from the coil with the metal portion remaining in the boot. When I had the misfire, I figured I hadn't put this coil back together correctly and maybe damaged it. I removed the coil, but when I pulled the plug only half of it came out. The plug was completely sheared at the base of the ceramic. i put one of the old plugs back in and an old coil from when I replaced them a few years ago. Now the car is running fine.
Do you think the coil caused the spark plug to break, or was the plug defective? Can a misfire break a plug? I don't want to keep running the old coil (it is one of the factory originals). I don't know if I should buy a new coil, or put back the one I have been running for a couple of years. I don't want to use it again if it might have caused the broken plug.
