I have a 2006 LBZ. It developed a knock and started missing (running rough). When I turn off cylinders with EFI Live it makes no change in Engine at all except when I turn off Cylinder 4 which causes engine to run smooth. This was opposite to what I expected. When I had my shop and repaired gas engines in the pre computer days I had a SnapOn Diagnostic Tool that would cut out cylinders and when you cut out the bad cylinder there would be no change to the engine RPM and when you cut out a working cylinder the RPM would decrease and the engine would miss even more.

Please help me find my bad injector.

Thanks, Ricky Smith