Similar unit to a Hyster Forits 80, digital 2 line dash, EFI, LPG V6

This machine had a problem with the hydraulic valve body and was repaired. I did the final assembly of the machine and took it for a test lift. Machine started up fine, drove ok etc. When I went to pick up a bail of pulp, the machine stalled. And then it would not start. There were no strange noises etc.

The computer is not showing any error codes.

This is a real head scratcher, we've done all the "logical" things with it. Have fuel, spark air etc.

Attempting to start it with "fire start" yields no results.

We are now at the stage where the plugs are pulled and doing a compression test. Everything specs out.

We cooked a starter from (assuming) attempting so many cranks on it during debugging. A new starter was installed and a strange observation was made. When the old starter was failing, you could tell it was loosing power/strength. The new starter is showing the same signs even with the spark plugs removed. One would assume that it should toss that engine over with little effort. (There is oil on the stick).

We're stumped, no idea what to do next.

Comments appreciated!

Thanks!

Jim