This is a link to the final blog entry of a fellow who has upgraded his 2002 to fuel injection and an ECU. Its a fascinating trip through his process, custom and home made fittings, and generally a can do attitude towards the whole project:

http://www.finkbuilt.com/blog/fuel-i...sion-complete/

If I remember it was brought on by an engine rebuild, and the inevitable performance upgrades which brought out the limitations and compromises in drivability in the original carborated and mechanical ignition.