Coolant in #8 spark plug well

[Nelson_00'_Expy]

Whats up you guys im in need of some help. I was driving down the freeway when all of a sudden my expy started to missfire. Hooked up my scanner and said it was code p0308. So i went home removed coil pack and lucky me i found the spark plug full of coolant. I know these engines are notorious for intake manifold leaks. I would like to know if its the gasket thats leaking or if the intake manifold is cracked. By the way i have a 2000 expy with the 5.4L

 

[thenaaks]

I'd say most likely gasket leaking. That's been my experience on a couple ford modular engines.

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[z168]

Its more likely its the intake manifold. But the best way would be to check the usual spots for the infamous intake manifold cracks. That is your best bet