using SCAN to diagnose fuel problem

[Boost]

How can I best use my EFILive to help diagnose a starting problem on a 2002 with water in the fuel? The tank has been flushed and the filter changed, it runs on ether but won't start. More specifically, what paramaters / data can I monitor to diagnose the problem? Thanks!

[ARZ]

Never start the Duramax with ether it is well documented it can DESTROY your motor. Several have had an over rev and broken everything from rods to rockers.

I would suggest a lift pump with a dedicated water separator, much cheaper insurance to make sure you have fuel and it doesn't have water in it.

[Boost]

Thanks, and I agree with you. I would never do that, this is an older gentleman that doesn't know much about cars, just trying to help him. He did all kind of "ghetto stuff" before I got there :(