Misfire cylinder 8

recently check engine light came on pulled the code 0308. changed spark plugs and the coil on #8 ran fine for couple days then light came on again.. so every now an then truck would idle rough then go away the other day i noticed the coolant level was low. read some articles on line that it might be a blown head gasket.. truck has never overheated, no white smoke, no change in oil color truck has only 50,000 miles on it BTW its a 2014 toyota tundra 5.7 v8 any feed back would be greatly appreciated

 

Seems like your still under factory warranty right? Let the dealership figure it out. Unless you literally just passed the 5 year mark, and if so, still ask them to help you out.

 

thank you i highly doubt it but will check into it.. BTW it jus overheated while in my garage last night i got lucky iwasnt on the road pulled #8 plug and it was wet not with gas either..

 

To see if you have a blown head gasket remove the radiator cap. If you see it bubbling then the head gasket is blown. Coolant should just flow but not bubble or sputter out of it.