I had a miss so I started dissconnecting one coil at a time until I found the miss fire on #8 . When I removed the coil I found the the spark bore was full of rust and the spark plug was not firing and the plug itself was very rusty.
After I cleaned out the rust I removed plug and cleaned where the plug seats in the head. Replaced the plug and it runs great. The head is aluminum so the rust had to come from the plug. I also think the plug was shorted. Probably the main cause of the miss rather than rust on the plug seat. When I change plugs I always save the best 2 just incase one of them goes bad. Good thing because they never keep them in stock and takes a few days to get them in.
Just can't figure how moisture got in there to begin with. There's no coolant leaks etc. Well I did have coolant puke out last summer when the relay to my electric water pump took a crap on me. You'd think if that was the cause it would have missed before now. I had it started about 3 weeks earlier and it ran fine
The rest of the plugs are fine. The spark plug boot looked fine so I have no idea how liquid found it's way in. Since I have extra coils I replaced the coil and boot just for good measure.
After I cleaned out the rust I removed plug and cleaned where the plug seats in the head. Replaced the plug and it runs great. The head is aluminum so the rust had to come from the plug. I also think the plug was shorted. Probably the main cause of the miss rather than rust on the plug seat. When I change plugs I always save the best 2 just incase one of them goes bad. Good thing because they never keep them in stock and takes a few days to get them in.
Just can't figure how moisture got in there to begin with. There's no coolant leaks etc. Well I did have coolant puke out last summer when the relay to my electric water pump took a crap on me. You'd think if that was the cause it would have missed before now. I had it started about 3 weeks earlier and it ran fine
The rest of the plugs are fine. The spark plug boot looked fine so I have no idea how liquid found it's way in. Since I have extra coils I replaced the coil and boot just for good measure.