With sealing the valves and intake and exhaust for the air compressor cylinders, the compressor cylinders will operate like a 2-cycle engine. Just make sure the air inlet has low enough restriction or you'll pull quite a vacuum in the cylinders. Gassers don't seem to have any trouble with that, though.
Step one is to take any handy 240D and crack the lines to two of the injectors and see how it starts and runs. Is it still driveable, however poorly, or are parasitic losses at that point so high that it can barely turn itself over?
You will have to do something with the injection pump for those two cylinders. Is it possible to turn down the delivery to zero? If not,
Easy to just capture the output and circulate it back to the return line. -- Jim
