The wire is hard to trace. Here's the best I can do without taking a bunch of stuff off. The way the end of the wire is cut makes me think it hasn't been used in a while. I also can't see anything near it for it to connect to.
The wires to the IP and the IP shut off valve pass a visual check. I checked for voltage to the IP shut off valve and made sure it was clicking when the key was turned.
I do not have the tools to change the timing belt. Can I just spin the engine at the crank shaft with the 19mm 12 point socket?
I haven't checked every time but is seems like the glow plug light comes consistently. The rpm gauge doesn't really move much when cranking the engine but I usually don't crank the engine very long.
One thing I've noticed is that the first time cranking after letting sit it will usually fire for a couple of seconds when cranking and then stops firing. If I try to crank it again it won't fire any more. It seems like it's getting enough fuel and air to run momentarily and then runs out.