I didn't see that you tested the fuel accumulator. It's an often overlooked part of the KE system. Mine failed and there's and easy on-the-car test to determine if it has an internal leak. Suggest you read the following thread. The test is in post #11.

http://www.peachparts.com/shopforum/tech-help/365488-m103-starting-problem.html

The following is the post mortem failure analysis report for the FA.

http://www.peachparts.com/shopforum/tech-help/373307-ke-fuel-accumulator-destructive-failure-analysis.html

Duke