Join Date: May 2012
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starting without glowplug in cylinder no. 1
We are doing a sort of research project. We want to outfit a 6L Powerstroke with a fiber optic pressure sensor in one of the cylinders. This sensor is connected to some electronics that is also connected to the buffered crankshaft position sensor signal that runs from the PCM to the FICM. This electronic system then logs data and can make a plot of pressure vs. volume called an indicator diagram. This is for fuels research.
So my question, what is the best procedure for starting the engine? I was thinking, start the engine with the glowplug in, get it hot. Swap out with the sensor while the engine is still hot. Then restart the engine and run the tests.
...or... just try and start with the sensor in. There will probably be some unburned fuel in the cylinder by the time it gets going and a bit smoke and soot and hope the sensor doesn't get fouled with soot.
The company that makes the sensor, Optrand has a patent for a glowplug with their sensor built in. But it was a development they never pursued. All they have is sensor that will fit into the glow plug port.