If it dies as soon as you pull the ignitor off it's most likely one of two things.
First thing to do is lean the hsn about 1/4 turn and try again. If you can pull the ignitor and it tries to run you may need to lean it a bit more. Maybe 1/8 turn at a time untill it will continue to run. Just don't go too lean.
If it still dies as soon as the ignitor is remove after the first adjustment, put in a new glow plug.
To get the engine to start easier, heat the engine with a heat gun and back the glow plug out 1/4 to 1/2 turn and tighten it back down as soon as the engine starts running.