My bird's 106 diseasel's playing up. Seems like one or two glow plugs are dead by the way it's starting.
1) Can I test them with a multimeter? They don't seem to be noticably warmer than each other when you touch the tops of them (assuming the things that are situated where the spark plugs would be on the average petrol engine are glow plugs...)
2) Can I swap them with a spark plug socket?