Misfire

2013 Tundra 4x4 Flex fuel 206,000 +miles. Check engine light, traction control light both came on solid and 4Lo is on flashing. Showed misfire on #8 cylinder. We replaced all the coils and plugs. Still shows #8 misfire. Changed #8 fuel injector and cleaned the others. Still showing misfire. Also did relearn on fuel %. Did a cylinder compression test with tech stream. Checked ok. Having someone do this work for me and just at a loss. Anyone have any recommendations?

 

Do an actual compression test on all cylinders. Mine did this very thing. Was a broken valve spring. Fortunatley for me, it didn't drop the valve. Simple fix...nope. However the spring was less than $8 bucks and I'm a retired mechanic.

 

Just wanted to post we found the issue and it was a leaking head gasket. Water was getting into the cylinder.