Citroen C3 HDi 1.4 16v running on gas to test the engine

When the engine didn't run on diesel, it was tested on gas (propane/butane). This was used to prove the mechanicals were OK (valves, timing, pistons etc). With it running on gas, the leaves the electronic and fuel delivery to diagnose. The gas was let into the crankcase ventilation connection on the inlet pipe. Thanks to imdady for the video :) Citroen C3 2004, 200K miles, 16v 1.4 HDi Delphi system, non runner.