Nissan Pathfinder SE V6, First Generation (1990), ~200 000 km.
This vehicle was off roading and had the left front corner submerged up to the air filter for about an hour. After letting it dry out in the and cleaning out the air filter which was soaked (although there wasn't a pool of water in the box) we tried to crank the engine.
It wouldn't rotate very good and after a few seconds would not rotate at all. Thinking that water was in the cylinders we removed the plugs and rotated the engine. Now it cranks as it had before the flood, but will not fire. What is the next step for trouble shooting?
Yikes, hopefully the hydrolic lock didn't bend the crank at all. IT cranks so it's probably ok.
My first expectation would be a spark loss. With a spark tester you can verify this. Any and all ignition components need to be looked at for moisture, cap and rotor should get pulled off (pretty sure it isn't DIS), there may be a connection soaked.