UPDATE: now, the engine just starts up bwarrr then stops right away..... it shouldnt be the glow ignitor, cause when it started the engine before, when i took the engine out, iat would stop. so pretty much, it wont even start anymore. could it be the plug? also, when it starts for that short second, it heats up... so it overheats too. i have no idea what the problem is, right now everything is at factory settings