My car flooded, what can I do?

Recently, my car flooded in a long rain storm we had. The water was up to the seats. I only have liability insurance, so claiming it is not an option.

I drained all fluids, cleaned the inside very well, and cleaned as many electrical components as I could find. I cranked the engine without spark plugs, and no water came out. I changed the air filter and the spark plugs. The car will idle fine, and it will even drive just like it did before the flooding.

However, it has broke down twice. Both times were after long, uninterrupted runs (ie. interstate, highway). It would break down only when I slowed down, and then turned the wheel. So, both times the car stalled when I turned the wheel. After this, the car wouldn't start, unless I gave it 10 or 20 minutes or so. If I gave it that much time, I could start it, but only drive a few blocks before stalling again, before it stalled again without turning the wheel.

I've been told to change the ECM (ECU). Does my problem sound electrical? It almost seems like over heating to me because it only happens after long runs, and if I wait a while (to let it cool) it will fire back up.

I only throw a Check Engine Light when it stalls. But when it starts up, the CEL is gone. The only other light I have up is the airbag light which shouldn't be on.

Do you have any ideas of what is causing me to stall? I'll be bringing it to a mechanic shortly, but I'd like to get an idea from some of you who have experience with things like this. Thanks!