ECU's almost never go bad. It's obvious you did not need one.
The very next time this happens, reset the computer by
turning the ignition switch off and back on after 1 second.
If the engine runs OK for the next several seconds you can
rule out most mechanical problems. For example, a bad
wire, or a clogged fuel filter will not fix itself by this.

            Eric                   86-VW4x4
            vw4x4@fyi.net          72-240z
            Pittsburgh, PA USA     1936-Chrysler