Wow, i forgot all about the glow plug, this has a big influence on your engine, yes they can die out, wrench out the glow plug and stick it in your igniter, see if it glows bright red, if it doesnt, then you have a bad glow plug, make sure your battery is charged. Also, i have read in magazines, that if it is a older plug, or the one you used for break in, then it will affect your tuning and make it difficult. I hope you can get it running.