Hi,
okay, wow, then I have some other suggestions:
- Intake air temperature sensor
- Intake air flow sensor
Or with other words: Grab all connectors you can find, disconnect them, dry and clean them and reconnect them. Same for the spark plugs and the distributors. Sure, it's possible that one of you sensors also got broken by the water or just by bad luck. If you want to be more deterministic, you can readout the fault memory of your ECU!
A really weird fault!
Bastian