Codes P305 and P306

[1MadSHO95]

I have 96 SHO. When cold, has a miss on 5 and 6 cylinders. When it gets to operating temperature, the car runs great. The #5 spark plug is wet with i believe is coolant.
The car has a had a recent tune up with coils. Thermostat replaced. And a recent water pump.

I am posting this for a friend who is having trouble with his car. :rainshit:

Any help is greatly appreciated!! :banghd:

 

[SHOZ123]

Why do you think it is coolant? Maybe leaking FIs.

 

[1MadSHO95]

I was diagnosing the car over the phone so i don't know if it is coolant but he said the spark plug was wet.