meerkatmag wrote:Is there any way of testing if it's working?
There is a control module in the engine compartment. A control connector is connected to the module - two pins. If the control connector is shorted - the module will operate regardless of the temperature, after turning on the ignition.
meerkatmag wrote:And how does it operate, does the module sense the outside temperature and only start the system when temperature is low enough? Is there a dash light when it's operating, presumably before you turn over the engine, I've never seen it come on.
This is probably the most unreliable system of all Ford cars.
If it works, then for the first 3-4 years. Later it's just a dummy with a maliciously working control light.
In the Mk5 model from 1997 there is a new third module, maybe it is better, more reliable. I do not know...
Second - the system works when the temperature in the engine compartment is below -5 Celsius. It may be -20 Celsius outside, but with a warm engine it won't work. So the system usually works after a night stop in the appropriate cold.
The control light should be where I marked the arrow in the attachment. I don't know your clocks well.
The module first turns on the indicator on instrument panel,solenoid valve and flame plug. When the light is on, the plug gets full voltage + 12V (it has a nominal voltage of about 8V). A cold engine gets hot fumes from glow plug and starts it easier. When the indicator goes out, the plug is powered by a lower voltage through a resistor - the system works for some time after starting the engine.
Many vans in the UK do not have this system because of the mild Atlantic climate.
An efficient 2.5D engine with good compression starts very well after a night's stop in the winter - without this system.
meerkatmag wrote:To be honest I don't think I've ever started the engine at -5c. You might have noticed in the pic that the fuel cable at the bottom has come apart. I was trying to fix it and there was diesel inside the pipe, so maybe it has operated at some point?
If you have no problems starting the engine, leave it alone. We have global warming, according to smart girls ...
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