1992 Mazda B2600 Explosions

Electrical problem
1992 Mazda b2600 4 cyl Manual

The distributor get some water into it and after we cleaned it inside a failure showed up. If the truck is cold (during the mornings) it started like it will be out of time but once it get warmer the condition disappear but if you push the gas I get some explosions on high revolutions and when you are driving suddenly it stops like if you close the key.
I had taken the truck with a different mechanics and I had change the following parts and the problem still persist: Air Mass, The 3 filters (Gas, Air & Oli), Spark plugs, ECU (2 guys told me that the problem was the computer and I changed it and the problem continues). Spark plug cables, from the distributor: The rotor and the distributor cover. The truck was put on time and the problem continues.
The big shops I had visited doesn't have the connector to get the computer to scan it to detect where the failure came from so I don't know what to do. The only think that happen was the the distributor get water into it so I guess that the problem should be there, what is your opinion?