OK its the head gasket, they did a chemical test in the coolant an found other fluids. Its getting fixed now. Thanks for the info everybody.

The 5thcylinder plug looks fine, but I still put a new plug and coil on just to make sure, and then put those on the first cylinder to see if they were bad but they are all fine. As for it being head gasket leak or bad injector I will look into those possibilities, I had not thought about that. Than...

So my check engine light has been going on and off for a little under a year now. The code is most always a cylinder 5 misfire, but after changing out plugs and coils the CEL still comes on. The CEL will stay on for months and then go off for a couple of weeks before coming back on, so I can't ident...