2011 ls7 crate motor misfire

[billyram]

I have a LS7 crate motor with automatic trans that has misfired under heavy load sence new. Running at part to moderate throttle it runs smooth as well as cruising speed. I have had it dyno tuned but the misfire has gotten worse. I have changed plugs with no luck. No Codes.
Billy

[joecar]

Log files...?

[billyram]

I have a new flashscan and can't seem to get live data to work. My computer seems to lock up. I'm trying to work with customer service on this and having a bit of difficulty communicating.
Billy

[joecar]

Hey Billy,

When does your PC lockup...?

Try re-downloading V7 and V8 software, and re-installing... make sure you are logged in as Admin.

After you install V8, you also have to flash firmware in to V2, and you have to configure V2.

-Joe

[billyram]

Customer service found problems with my laptop and trying to get them fixed.
Billy