Now the weather is a bit colder, I've noticed a few times that the Cherokee has a couple of splutters within the first 2 seconds of starting, which it didn't used to.
It starts and runs, but you do feel a couple of rough judders, literally only for 1 - 2 seconds, then it runs OK.
The glow plugs are relatively new, under 25/30k miles, but I thought I would test them in-case one is not warming up properly.
I found that you can test by using a multimeter connected to the battery and the top of the glow plug, supposedly, if the multimeter reads what the battery's base voltage is, that plug is OK and you move on to test the next one.
All of them seemed okay, but I was unsure if the test actually works
Has anyone done this before or had any expericence of it working?
I was just thinking that the plug must be 'earthing' itself through the head and would complete the circuit to read the battery base voltage, whatever its condition is.
This is the 'How To' video I followed if anyone is interested: