The Engine Simulator is a device designed to simulate a running motor to aid in ECU development.
Some links: (None of which work as of 1.7.2005, and certainly way before then)
http://www.pgmfi.org/phorum/read.php?f=5&i=3444&t=3444
http://www.pgmfi.org/phorum/read.php?f=5&i=4089&t=4089
http://www.pgmfi.org/phorum/read.php?f=5&i=3888&t=3888
http://www.pgmfi.org/phorum/read.php?f=5&i=4311&t=4311
http://www.pgmfi.org/phorum/read.php?f=5&i=3454&t=3454
The first three threads from above can be found at the Internet Archive:
http://web.archive.org/web/20031101070445/http://www.pgmfi.org/phorum/read.php?f=5&i=3444&t=3444
http://web.archive.org/web/20040130181552/http://www.pgmfi.org/phorum/read.php?f=5&i=4089&t=4089
http://web.archive.org/web/20040129032605/http://www.pgmfi.org/phorum/read.php?f=5&i=3888&t=3888
Working sim 27-1-07