Just found the site searching for manuals on this engine (no luck)...so I figured I'd try a post here. I have a 1992 CH612 with an EM7-300 engine. It was out on the road one day running fine, and all of the sudden it quit running...no warnings whatsoever. Got it back into the shop to check it out and here is the scenario so far: Fires on ether, but not with diesel Checked the pickup tube from tank - A-OK Cracked 2 of the injector lines loose and cranked it, no fuel Checked the fuel shut off solenoid, seems to be operating properly...even tried to eliminate the plunger/spring and run without it - still no fuel pumping Tried replacing engine position sensor, no luck Called a few people, one place says it could be electronic (fuel pedal module or fuel transfer pump) - another shop says it could be the fuel injection pump itself. Is there any place that I can find an actual troubleshooting manual or service manual for this year truck with a troubleshooting guide and component location guide in it? I tried mack direct, but wound up with an overhaul manual that did absolutely no good. Any suggestions/input on this hair removal engine, would be greatly appreciated! Don Cleveland, OH