If I may continue, the following is from the mil-veh list:
"If you have that Military Vehicles article, it describes things to check for correct operation. Mine wasn't working due to broken insulation in the spark plug AND an intermittent ignitor.
Easiest check is for spark by removing the plug and powering up the ignitor only. If spark is steady then check for fuel spray. You can power up the flame heater's fuel pump (with the in-tank pump on also) and look into the spark plug hole for fuel mist. The better way is to remove the injector and inspect for a good fuel spray pattern/mist.
After getting my flame heater working, I bought Bjorn Bramstedt's flame heater monitor and my results were similar to what he found in his testing described in the MV magazine article; with a turbo motor, the flame is blown out when the engine is running. In other words, you cannot operate the flame heater after idling to expedite heating and get it running smoothly, as they describe in the operator's manual as well as the dash plate. On mine, I also notice that there is a good 1 sec delay between activating the heater while cranking and actually getting a flame. I believe this is due to the time it takes for the flame heater's pump to generate pressure and operate the injector."
It was submitted by David Oheim a couple of years ago.